CVE-2026-28369

criticalpriority · track · 36EPSS 0.007 · 53 %ileDEEUNLUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.69% (53rd) EPSS

CVSS 9.1 · critical

Is it mine?

53 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cert_bund · ncsc_nl

EPSS · scored 2026-10-27

A flaw was found in Undertow. When Undertow receives an HTTP request where the first header line starts with one or more spaces, it incorrectly processes the request by stripping these leading spaces. This behavior, which violates HTTP standards, can be exploited by a remote attacker to perform request smuggling. Request smuggling allows an attacker to bypass security mechanisms, access restricted information, or manipulate web caches, potentially leading to unauthorized actions or data exposure.

cvss

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

9.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 8.3–9.1

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 5.2

v3.18.7highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:Nsecondary · ENISA EU

v3.18.7highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:Nsecondary · secalert@redhat.com USexploitability 2.2 · impact 5.8

v3.18.7highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:Nsecondary · OSV

v3.18.3highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · NCSC-NL NL

ssvc

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

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

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-444USCWE-444USCWE-444US

affected products (53)

Products and version ranges known to be affected.

Communicationsall versionscert_bundDEcpe:/a:oracle:communications:25.2.201
Communicationsall versionscert_bundDEcpe:/a:oracle:communications:8.0-8.3
Communicationsall versionscert_bundDEcpe:/a:oracle:communications:8.0-8.1
Communicationsall versionscert_bundDEcpe:/a:oracle:communications:7.5.1
Communicationsall versionscert_bundDEcpe:/a:oracle:communications:7.0.0
Communicationsall versionscert_bundDEcpe:/a:oracle:communications:47.0.0.2.0
Communicationsall versionscert_bundDEcpe:/a:oracle:communications:24.2.4-25.2.000
Communicationsall versionscert_bundDEcpe:/a:oracle:communications:26.1.202
Communicationsall versionscert_bundDEcpe:/a:oracle:communications:26.1.200
Communicationsall versionscert_bundDEcpe:/a:oracle:communications:25.2.202
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Oracle Communications 11.0all versionscert_bundDEcpe:/a:oracle:communications:11.0
Oracle Communications 14.0all versionscert_bundDEcpe:/a:oracle:communications:14.0
Oracle Communications 15.0.0.0.0all versionscert_bundDEcpe:/a:oracle:communications:15.0.0.0.0
Oracle Communications 15.0.1.0.0all versionscert_bundDEcpe:/a:oracle:communications:15.0.1.0.0
Oracle Communications 15.1.0.0.0all versionscert_bundDEcpe:/a:oracle:communications:15.1.0.0.0
Oracle Communications 15.2.0.0.0all versionscert_bundDEcpe:/a:oracle:communications:15.2.0.0.0
Oracle Communications 25.1.100all versionscert_bundDEcpe:/a:oracle:communications:25.1.100
Oracle Communications 25.1.200all versionscert_bundDEcpe:/a:oracle:communications:25.1.200
Oracle Communications 25.2.100all versionscert_bundDEcpe:/a:oracle:communications:25.2.100

showing 20 of 53

advisories (4)

Vendor and ecosystem advisories describing this.

NCSC-2026-0444Kwetsbaarheden verholpen in Oracle CommunicationsNL2026-10-21csaf · ncsc_nlNL
Oracle heeft 110 kwetsbaarheden verholpen in diverse Oracle Communications-producten, waaronder Oracle Communications Unified Assurance, Oracle Communications Cloud Native Core Security Edge Protection Proxy, Oracle Communications Service Catalog and Design en Oracle Communications Operations Monitor.
WID-SEC-W-2026-0907Red Hat Undertow: Mehrere Schwachstellen ermöglichen Umgehung von SicherheitsmaßnahmenDeutsch2026-03-29csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Red Hat Undertow ausnutzen, um Sicherheitsvorkehrungen zu umgehen, Daten zu manipulieren und vertrauliche Informationen offenzulegen.
WID-SEC-W-2026-4090Oracle Communications: Mehrere SchwachstellenDeutsch2026-10-20csaf · cert_bundDE
Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Oracle Communications ausnutzen, um die Vertraulichkeit, Integrität und Verfügbarkeit zu gefährden.
GHSA-vqqj-9cmv-hx43Undertow is Vulnerable to HTTP Request/Response Smuggling2026-03-27ghsa · osvUS
A flaw was found in Undertow. When Undertow receives an HTTP request where the first header line starts with one or more spaces, it incorrectly processes the request by stripping these leading spaces. This behavior, which violates HTTP standards, can be exploited by a remote attacker to perform request smuggling. Request smuggling allows an attacker to bypass security mechanisms, access restricted information, or manipulate web caches, potentially leading to unauthorized actions or data exposure.

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund ncsc_nl osv NVD CVE.org MITRE

published 2026-03-27modified 2026-10-26

references (10)

External citations — patches, advisories, analysis.

scry

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