CVE-2025-61919

highpriority · track · 0EPSS 0.006 · 50 %ileDEEUFRRUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.65% (50th) EPSS
CVSS 7.5 · high
Is it mine?
72 products
Check your exposure
Who says so?
7 sources
cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-22

Rack is a modular Ruby web server interface. Prior to versions 2.2.20, 3.1.18, and 3.2.3, `Rack::Request#POST` reads the entire request body into memory for `Content-Type: application/x-www-form-urlencoded`, calling `rack.input.read(nil)` without enforcing a length or cap. Large request bodies can therefore be buffered completely into process memory before parsing, leading to denial of service (DoS) through memory exhaustion. Users should upgrade to Rack version 2.2.20, 3.1.18, or 3.2.3, anu of which enforces form parameter limits using `query_parser.bytesize_limit`, preventing unbounded reads of `application/x-www-form-urlencoded` bodies. Additionally, enforce strict maximum body size at the proxy or web server layer (e.g., Nginx `client_max_body_size`, Apache `LimitRequestBody`).

01

remediations

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

A vendor fix is available.

  • Fixedhawk2-0:2.7.0+git.1742310530.bfcd0e2c-160000.3.1.ppc64le as component of SUSE Linux Enterprise High Availability Extension 16.0suse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedhawk2-0:2.7.0+git.1742310530.bfcd0e2c-160000.3.1.s390x as component of SUSE Linux Enterprise High Availability Extension 16.0suse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedhawk2-0:2.7.0+git.1742310530.bfcd0e2c-160000.3.1.x86_64 as component of SUSE Linux Enterprise High Availability Extension 16.0suse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedhawk2-0:2.7.0+git.1742310530.bfcd0e2c-160000.3.1.ppc64le as component of SUSE Linux Enterprise Server for SAP applications 16.0suse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedhawk2-0:2.7.0+git.1742310530.bfcd0e2c-160000.3.1.x86_64 as component of SUSE Linux Enterprise Server for SAP applications 16.0suse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedruby4.0-rubygem-rack-2.2-0:2.2.22-1.1.aarch64 as component of openSUSE Tumbleweedsuse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedruby4.0-rubygem-rack-2.2-0:2.2.22-1.1.ppc64le as component of openSUSE Tumbleweedsuse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedruby4.0-rubygem-rack-2.2-0:2.2.22-1.1.s390x as component of openSUSE Tumbleweedsuse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedruby4.0-rubygem-rack-2.2-0:2.2.22-1.1.x86_64 as component of openSUSE Tumbleweedsuse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedhawk2-0:2.7.0+git.1742310530.bfcd0e2c-160000.3.1.aarch64 as component of openSUSE Leap 16.0suse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedhawk2-0:2.7.0+git.1742310530.bfcd0e2c-160000.3.1.ppc64le as component of openSUSE Leap 16.0suse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedhawk2-0:2.7.0+git.1742310530.bfcd0e2c-160000.3.1.s390x as component of openSUSE Leap 16.0suse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedhawk2-0:2.7.0+git.1742310530.bfcd0e2c-160000.3.1.x86_64 as component of openSUSE Leap 16.0suse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

02

cvss

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

7.5
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · security-advisories@github.comexploitability 3.9 · impact 3.6
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · OSV
v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · SUSE Product Security
03

ssvc

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

Trackcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-400USCWE-400USCWE-400US
05

affected products (72)

Products and version ranges known to be affected.

showing 20 of 72
06

advisories (7)

Vendor and ecosystem advisories describing this.

  • SUSE-SU-2026:20091-1Security update for hawk22026-01-13csaf · suse_csafDE

    Security update for hawk2

  • SUSE-SU-2026:20093-1Security update for hawk22026-01-13csaf · suse_csafDE

    Security update for hawk2

  • WID-SEC-W-2025-2482Red Hat Enterprise Linux: Mehrere Schwachstellen ermöglichen Denial of ServiceDeutsch2025-11-03csaf · cert_bundDE

    Ein Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux ausnutzen, um einen Denial of Service Angriff durchzuführen.

  • openSUSE-SU-2026:10286-1ruby4.0-rubygem-rack-2.2-2.2.22-1.1 on GA media2026-03-04csaf · suse_csafDE

    ruby4.0-rubygem-rack-2.2-2.2.22-1.1 on GA media

  • openSUSE-SU-2026:20025-1Security update for hawk22026-01-13csaf · suse_csafDE

    Security update for hawk2

  • GHSA-6xw4-3v39-52mmRack is vulnerable to a memory-exhaustion DoS through unbounded URL-encoded body parsing2025-10-10ghsa · osvUS

    ## Summary `Rack::Request#POST` reads the entire request body into memory for `Content-Type: application/x-www-form-urlencoded`, calling `rack.input.read(nil)` without enforcing a length or cap. Large request bodies can therefore be buffered completely into process memory before parsing, leading to denial of service (DoS) through memory exhaustion. ## Details When handling non-multipart form submissions, Rack’s request parser performs: ```ruby form_vars = get_header(RACK_INPUT).read ``` Since `read` is called with no argument, the entire request body is loaded into a Ruby `String`. This occurs before query parameter parsing or enforcement of any `params_limit`. As a result, Rack applications without an upstream body-size limit can experience unbounded memory allocation proportional to request size. ## Impact Attackers can send large `application/x-www-form-urlencoded` bodies to consume process memory, causing slowdowns or termination by the operating system (OOM). The effect scales linearly with request size and concurrency. Even with parsing limits configured, the issue occurs *before* those limits are enforced. ## Mitigation * Update to a patched version of Rack that enforces form parameter limits using `query_parser.bytesize_limit`, preventing unbounded reads of `application/x-www-form-urlencoded` bodies. * Enforce strict maximum body size at the proxy or web server layer (e.g., Nginx `client_max_body_size`, Apache `LimitRequestBody`).

  • CERTFR-2026-AVI-1352Multiples vulnérabilités dans Oracle PeopleSoftFrançais2026-10-21vendor · certfrFR
07

also known as (4)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducert_bundsuse_csafosvcertfrNVDCVE.orgMITRE
published 2025-10-10modified 2026-10-19
09

references (14)

External citations — patches, advisories, analysis.

scry

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