7.5

CVE-2025-61919: rack Uncontrolled Resource Consumption

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2025-61919DEBIAN-CVE-2025-61919CGA-227v-pcr3-c5v5
Published 10-10-2025Last modified 10-10-2025
Open JSON

Vulnerability summary

CVE-2025-61919 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in rack. EPSS estimates a 0.65% chance of exploitation in the next 30 days, higher than 50.1% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.65%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 23 · Related 14
DLA-4357-1DSA-6048-1MGASA-2025-0334OPENSUSE-SU-2026:10286-1OPENSUSE-SU-2026:20025-1RHSA-2025:19512

Timeline

  1. 10-10-2025
    PublishedVulnerability first disclosed.
  2. 10-10-2025
    Last modifiedVulnerability information updated.

Description

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`).

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.65%

Chance of exploitation in the next 30 days

Percentile

50%

Versus all other CVEs

30-day change

0.00 pp

From 0.65% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.65%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard52 products
  • gitlab-cng-18.2All versions (No fix recorded)
  • gitlab-logger-18.2All versions (No fix recorded)
  • gitlab-rails-ce-18.1< 18.1.6-r13
  • gitlab-rails-ce-18.2All versions (No fix recorded)
  • gitlab-rails-ce-fips-18.1All versions (No fix recorded)
Wolfi9 products
  • gitlab-cng-18.2All versions (No fix recorded)
  • kube-fluentd-operator< 1.18.2-r49
  • kube-fluentd-operator-compat< 1.18.2-r49
  • kube-fluentd-operator-default-config< 1.18.2-r49
  • kube-fluentd-operator-oci-entrypoint< 1.18.2-r49
Debian1 product
  • ruby-rack< 2.2.20-0+deb12u1 | < 3.1.18-1~deb13u1 | < 3.1.18-1
Opensuse1 product
  • rubygem-rack-2.2&distro=openSUSE Tumbleweed< 2.2.20-1.1
Rack1 product
  • rack≥ 3.0, < 3.1.18 | ≥ 3.2, < 3.2.3 | < 2.2.20 | ≥ 3.0.0, < 3.1.18 | ≥ 3.2.0, < 3.2.3
RubyGems1 product
  • rack< 2.2.20 | ≥ 3.0, < 3.1.18 | ≥ 3.2, < 3.2.3
Ubuntu1 product
  • ruby-rackAll versions (No fix recorded) | < 2.0.7-2ubuntu0.1+esm8 | < 2.1.4-5ubuntu1.2 | < 2.2.7-1ubuntu0.5 | < 3.1.16-0.1ubuntu0.1

7 vendors · 66 products

References

13 links
Show all 13 references