CVE-2022-24801

mediumpriority · track · 33EPSS 0.028 · 86 %ileDEEURUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
2.80% (86th) EPSS
CVSS 6.8 · medium
Is it mine?
32 products
Check your exposure
Who says so?
7 sources
cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · scored 2026-10-27

Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to version 22.4.0rc1, the Twisted Web HTTP 1.1 server, located in the `twisted.web.http` module, parsed several HTTP request constructs more leniently than permitted by RFC 7230. This non-conformant parsing can lead to desync if requests pass through multiple HTTP parsers, potentially resulting in HTTP request smuggling. Users who may be affected use Twisted Web's HTTP 1.1 server and/or proxy and also pass requests through a different HTTP server and/or proxy. The Twisted Web client is not affected. The HTTP 2.0 server uses a different parser, so it is not affected. The issue has been addressed in Twisted 22.4.0rc1. Two workarounds are available: Ensure any vulnerabilities in upstream proxies have been addressed, such as by upgrading them; or filter malformed requests by other means, such as configuration of an upstream proxy.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • Fixedpython-twisted-0:16.4.1-20.el8ost.src as a component of Red Hat OpenStack Platform 16.2redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2022:1645
  • Fixedpython-twisted-debugsource-0:16.4.1-20.el8ost.ppc64le as a component of Red Hat OpenStack Platform 16.2redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2022:1645
  • Fixedpython-twisted-debugsource-0:16.4.1-20.el8ost.x86_64 as a component of Red Hat OpenStack Platform 16.2redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2022:1645
  • Fixedpython3-twisted-0:16.4.1-20.el8ost.ppc64le as a component of Red Hat OpenStack Platform 16.2redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2022:1645
  • Fixedpython3-twisted-0:16.4.1-20.el8ost.x86_64 as a component of Red Hat OpenStack Platform 16.2redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2022:1645
  • Fixedpython3-twisted-debuginfo-0:16.4.1-20.el8ost.ppc64le as a component of Red Hat OpenStack Platform 16.2redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2022:1645
  • Fixedpython3-twisted-debuginfo-0:16.4.1-20.el8ost.x86_64 as a component of Red Hat OpenStack Platform 16.2redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2022:1645
  • Fixedpython-twisted-0:16.4.1-20.el8ost.src as a component of Red Hat OpenStack Platform 16.1redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2022:1646
  • Fixedpython-twisted-debugsource-0:16.4.1-20.el8ost.ppc64le as a component of Red Hat OpenStack Platform 16.1redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2022:1646
  • Fixedpython-twisted-debugsource-0:16.4.1-20.el8ost.x86_64 as a component of Red Hat OpenStack Platform 16.1redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2022:1646
  • Fixedpython3-twisted-0:16.4.1-20.el8ost.ppc64le as a component of Red Hat OpenStack Platform 16.1redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2022:1646
  • Fixedpython3-twisted-0:16.4.1-20.el8ost.x86_64 as a component of Red Hat OpenStack Platform 16.1redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2022:1646
  • Fixedpython3-twisted-debuginfo-0:16.4.1-20.el8ost.ppc64le as a component of Red Hat OpenStack Platform 16.1redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2022:1646
  • Fixedpython3-twisted-debuginfo-0:16.4.1-20.el8ost.x86_64 as a component of Red Hat OpenStack Platform 16.1redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2022:1646
  • Fixedpython-twisted-web-0:12.1.0-8.el7_9.ppc64 as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2022:4930
  • Fixedpython-twisted-web-0:12.1.0-8.el7_9.ppc64le as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2022:4930
  • Fixedpython-twisted-web-0:12.1.0-8.el7_9.s390x as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2022:4930
  • Fixedpython-twisted-web-0:12.1.0-8.el7_9.src as a component of Red Hat Enterprise Linux Client Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2022:4930
  • Fixedpython-twisted-web-0:12.1.0-8.el7_9.src as a component of Red Hat Enterprise Linux ComputeNode Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2022:4930
  • Fixedpython-twisted-web-0:12.1.0-8.el7_9.src as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2022:4930
  • Fixedpython-twisted-web-0:12.1.0-8.el7_9.src as a component of Red Hat Enterprise Linux Workstation Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2022:4930
  • Fixedpython-twisted-web-0:12.1.0-8.el7_9.x86_64 as a component of Red Hat Enterprise Linux Client Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2022:4930
  • Fixedpython-twisted-web-0:12.1.0-8.el7_9.x86_64 as a component of Red Hat Enterprise Linux ComputeNode Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2022:4930
  • Fixedpython-twisted-web-0:12.1.0-8.el7_9.x86_64 as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2022:4930
  • Fixedpython-twisted-web-0:12.1.0-8.el7_9.x86_64 as a component of Red Hat Enterprise Linux Workstation Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

    https://access.redhat.com/errata/RHSA-2022:4930
  • Workaroundpython-twisted-0:16.4.1-20.el8ost.src as a component of Red Hat OpenStack Platform 16.2redhat_csaf

    Filter malformed requests like '+ or -' in Content-Length header, Illegal characters like LF(\n) and HTAB(\t), and 0x prefixes in HTTP Headers.

  • Workaroundpython-twisted-debugsource-0:16.4.1-20.el8ost.ppc64le as a component of Red Hat OpenStack Platform 16.2redhat_csaf

    Filter malformed requests like '+ or -' in Content-Length header, Illegal characters like LF(\n) and HTAB(\t), and 0x prefixes in HTTP Headers.

  • Workaroundpython-twisted-debugsource-0:16.4.1-20.el8ost.x86_64 as a component of Red Hat OpenStack Platform 16.2redhat_csaf

    Filter malformed requests like '+ or -' in Content-Length header, Illegal characters like LF(\n) and HTAB(\t), and 0x prefixes in HTTP Headers.

  • Workaroundpython3-twisted-0:16.4.1-20.el8ost.ppc64le as a component of Red Hat OpenStack Platform 16.2redhat_csaf

    Filter malformed requests like '+ or -' in Content-Length header, Illegal characters like LF(\n) and HTAB(\t), and 0x prefixes in HTTP Headers.

  • Workaroundpython3-twisted-0:16.4.1-20.el8ost.x86_64 as a component of Red Hat OpenStack Platform 16.2redhat_csaf

    Filter malformed requests like '+ or -' in Content-Length header, Illegal characters like LF(\n) and HTAB(\t), and 0x prefixes in HTTP Headers.

  • Workaroundpython3-twisted-debuginfo-0:16.4.1-20.el8ost.ppc64le as a component of Red Hat OpenStack Platform 16.2redhat_csaf

    Filter malformed requests like '+ or -' in Content-Length header, Illegal characters like LF(\n) and HTAB(\t), and 0x prefixes in HTTP Headers.

  • Workaroundpython3-twisted-debuginfo-0:16.4.1-20.el8ost.x86_64 as a component of Red Hat OpenStack Platform 16.2redhat_csaf

    Filter malformed requests like '+ or -' in Content-Length header, Illegal characters like LF(\n) and HTAB(\t), and 0x prefixes in HTTP Headers.

  • Workaroundpython-twisted-0:16.4.1-20.el8ost.src as a component of Red Hat OpenStack Platform 16.1redhat_csaf

    Filter malformed requests like '+ or -' in Content-Length header, Illegal characters like LF(\n) and HTAB(\t), and 0x prefixes in HTTP Headers.

  • Workaroundpython-twisted-debugsource-0:16.4.1-20.el8ost.ppc64le as a component of Red Hat OpenStack Platform 16.1redhat_csaf

    Filter malformed requests like '+ or -' in Content-Length header, Illegal characters like LF(\n) and HTAB(\t), and 0x prefixes in HTTP Headers.

  • Workaroundpython-twisted-debugsource-0:16.4.1-20.el8ost.x86_64 as a component of Red Hat OpenStack Platform 16.1redhat_csaf

    Filter malformed requests like '+ or -' in Content-Length header, Illegal characters like LF(\n) and HTAB(\t), and 0x prefixes in HTTP Headers.

  • Workaroundpython3-twisted-0:16.4.1-20.el8ost.ppc64le as a component of Red Hat OpenStack Platform 16.1redhat_csaf

    Filter malformed requests like '+ or -' in Content-Length header, Illegal characters like LF(\n) and HTAB(\t), and 0x prefixes in HTTP Headers.

  • Workaroundpython3-twisted-0:16.4.1-20.el8ost.x86_64 as a component of Red Hat OpenStack Platform 16.1redhat_csaf

    Filter malformed requests like '+ or -' in Content-Length header, Illegal characters like LF(\n) and HTAB(\t), and 0x prefixes in HTTP Headers.

  • Workaroundpython3-twisted-debuginfo-0:16.4.1-20.el8ost.ppc64le as a component of Red Hat OpenStack Platform 16.1redhat_csaf

    Filter malformed requests like '+ or -' in Content-Length header, Illegal characters like LF(\n) and HTAB(\t), and 0x prefixes in HTTP Headers.

  • Workaroundpython3-twisted-debuginfo-0:16.4.1-20.el8ost.x86_64 as a component of Red Hat OpenStack Platform 16.1redhat_csaf

    Filter malformed requests like '+ or -' in Content-Length header, Illegal characters like LF(\n) and HTAB(\t), and 0x prefixes in HTTP Headers.

  • Workaroundpython-twisted-web-0:12.1.0-8.el7_9.ppc64 as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    Filter malformed requests like '+ or -' in Content-Length header, Illegal characters like LF(\n) and HTAB(\t), and 0x prefixes in HTTP Headers.

  • Workaroundpython-twisted-web-0:12.1.0-8.el7_9.ppc64le as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    Filter malformed requests like '+ or -' in Content-Length header, Illegal characters like LF(\n) and HTAB(\t), and 0x prefixes in HTTP Headers.

  • Workaroundpython-twisted-web-0:12.1.0-8.el7_9.s390x as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    Filter malformed requests like '+ or -' in Content-Length header, Illegal characters like LF(\n) and HTAB(\t), and 0x prefixes in HTTP Headers.

  • Workaroundpython-twisted-web-0:12.1.0-8.el7_9.src as a component of Red Hat Enterprise Linux Client Optional (v. 7)redhat_csaf

    Filter malformed requests like '+ or -' in Content-Length header, Illegal characters like LF(\n) and HTAB(\t), and 0x prefixes in HTTP Headers.

  • Workaroundpython-twisted-web-0:12.1.0-8.el7_9.src as a component of Red Hat Enterprise Linux ComputeNode Optional (v. 7)redhat_csaf

    Filter malformed requests like '+ or -' in Content-Length header, Illegal characters like LF(\n) and HTAB(\t), and 0x prefixes in HTTP Headers.

  • Workaroundpython-twisted-web-0:12.1.0-8.el7_9.src as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    Filter malformed requests like '+ or -' in Content-Length header, Illegal characters like LF(\n) and HTAB(\t), and 0x prefixes in HTTP Headers.

  • Workaroundpython-twisted-web-0:12.1.0-8.el7_9.src as a component of Red Hat Enterprise Linux Workstation Optional (v. 7)redhat_csaf

    Filter malformed requests like '+ or -' in Content-Length header, Illegal characters like LF(\n) and HTAB(\t), and 0x prefixes in HTTP Headers.

  • Workaroundpython-twisted-web-0:12.1.0-8.el7_9.x86_64 as a component of Red Hat Enterprise Linux Client Optional (v. 7)redhat_csaf

    Filter malformed requests like '+ or -' in Content-Length header, Illegal characters like LF(\n) and HTAB(\t), and 0x prefixes in HTTP Headers.

  • Workaroundpython-twisted-web-0:12.1.0-8.el7_9.x86_64 as a component of Red Hat Enterprise Linux ComputeNode Optional (v. 7)redhat_csaf

    Filter malformed requests like '+ or -' in Content-Length header, Illegal characters like LF(\n) and HTAB(\t), and 0x prefixes in HTTP Headers.

  • Workaroundpython-twisted-web-0:12.1.0-8.el7_9.x86_64 as a component of Red Hat Enterprise Linux Server Optional (v. 7)redhat_csaf

    Filter malformed requests like '+ or -' in Content-Length header, Illegal characters like LF(\n) and HTAB(\t), and 0x prefixes in HTTP Headers.

  • Workaroundpython-twisted-web-0:12.1.0-8.el7_9.x86_64 as a component of Red Hat Enterprise Linux Workstation Optional (v. 7)redhat_csaf

    Filter malformed requests like '+ or -' in Content-Length header, Illegal characters like LF(\n) and HTAB(\t), and 0x prefixes in HTTP Headers.

02

cvss

Technical severity, 0–10. One row per scoring source.

8.1
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–8.1

v2.06.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 6.4
v3.18.1highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.2 · impact 5.9
v3.18.1highAV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU
v3.18.1highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU
v3.18.1highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · security-advisories@github.comexploitability 2.2 · impact 5.9
v3.18.1highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · OSV
v3.17.4highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)
v3.18.1highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · Red Hat Product Security US
03

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-444USprimaryCWE-444USCWE-444USCWE-444US
05

affected products (32)

Products and version ranges known to be affected.

showing 20 of 32
06

advisories (7)

Vendor and ecosystem advisories describing this.

  • RHSA-2022:1645Red Hat Security Advisory: Red Hat OpenStack Platform 16.2 (python-twisted) security update2022-04-29csaf · redhat_csafUS

    An update for python-twisted is now available for Red Hat OpenStack Platform 16.2 (Train). Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

  • RHSA-2022:1646Red Hat Security Advisory: Red Hat OpenStack Platform 16.1 (python-twisted) security update2022-04-29csaf · redhat_csafUS

    An update for python-twisted is now available for Red Hat OpenStack Platform 16.1 (Train). Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

  • RHSA-2022:4930Red Hat Security Advisory: python-twisted-web security update2022-06-07csaf · redhat_csafUS

    An update for python-twisted-web is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

  • WID-SEC-W-2022-0174Red Hat OpenStack: Schwachstelle ermöglicht Umgehen von SicherheitsvorkehrungenDeutsch2022-05-01csaf · cert_bundDE

    Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Red Hat OpenStack ausnutzen, um Sicherheitsvorkehrungen zu umgehen.

  • WID-SEC-W-2022-1335Xerox FreeFlow Print Server: Mehrere SchwachstellenDeutsch2022-09-07csaf · cert_bundDE

    Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Xerox FreeFlow Print Server ausnutzen, um die Vertraulichkeit, Verfügbarkeit und Integrität des Systems zu gefährden.

  • GHSA-c2jg-hw38-jrqqInconsistent Interpretation of HTTP Requests in twisted.web2022-04-04ghsa · osvUS

    The Twisted Web HTTP 1.1 server, located in the `twisted.web.http` module, parsed several HTTP request constructs more leniently than permitted by RFC 7230: 1. The Content-Length header value could have a `+` or `-` prefix. 2. Illegal characters were permitted in chunked extensions, such as the LF (`\n`) character. 3. Chunk lengths, which are expressed in hexadecimal format, could have a prefix of `0x`. 4. HTTP headers were stripped of all leading and trailing ASCII whitespace, rather than only space and HTAB (`\t`). This non-conformant parsing can lead to desync if requests pass through multiple HTTP parsers, potentially resulting in HTTP request smuggling. ### Impact You may be affected if: 1. You use Twisted Web's HTTP 1.1 server and/or proxy 2. You also pass requests through a different HTTP server and/or proxy The specifics of the other HTTP parser matter. The original report notes that some versions of Apache Traffic Server and HAProxy have been vulnerable in the past. HTTP request smuggling may be a serious concern if you use a proxy to perform request validation or access control. The Twisted Web client is not affected. The HTTP 2.0 server uses a different parser, so it is not affected. ### Patches The issue has been addressed in Twisted 22.4.0rc1 and later. ### Workarounds Other than upgrading Twisted, you could: * Ensure any vulnerabilities in upstream proxies have been addressed, such as by upgrading them * Filter malformed requests by other means, such as configuration of an upstream proxy ### Credits This issue was initially reported by [Zhang Zeyu](https://github.com/zeyu2001).

  • PYSEC-2022-1952022-04-04vendor · osvUS

    Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to version 22.4.0rc1, the Twisted Web HTTP 1.1 server, located in the `twisted.web.http` module, parsed several HTTP request constructs more leniently than permitted by RFC 7230. This non-conformant parsing can lead to desync if requests pass through multiple HTTP parsers, potentially resulting in HTTP request smuggling. Users who may be affected use Twisted Web's HTTP 1.1 server and/or proxy and also pass requests through a different HTTP server and/or proxy. The Twisted Web client is not affected. The HTTP 2.0 server uses a different parser, so it is not affected. The issue has been addressed in Twisted 22.4.0rc1. Two workarounds are available: Ensure any vulnerabilities in upstream proxies have been addressed, such as by upgrading them; or filter malformed requests by other means, such as configuration of an upstream proxy.

07

also known as (7)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bduosvcert_bundnvdredhat_csafNVDCVE.orgMITRE
published 2022-04-04modified 2026-06-17
10

references (36)

External citations — patches, advisories, analysis.

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