CVE catalog

CVE-2025-27219

Ruby vulnerabilities

Severity: Medium · CVSS 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Published: Feb 25, 2025, 11:00:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.85% · Oct 25, 2026

In the CGI gem before 0.4.2 for Ruby, the CGI::Cookie.parse method in the CGI library contains a potential Denial of Service (DoS) vulnerability. The method does not impose any limit on the length of the raw cookie value it processes. This oversight can lead to excessive resource consumption when parsing extremely large cookies.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	ruby3.1	bookworm	`3.1.2-7+deb12u1`	vulnerable
Debian	ruby3.1	bookworm-security	`3.1.2-7+deb12u1`	vulnerable
Ubuntu	ruby3.1	noble	Not reported	vulnerable
Ubuntu	ruby3.2	noble	`3.2.3-1ubuntu0.24.04.5`	fixed
Ubuntu	libruby3.2	noble	`3.2.3-1ubuntu0.24.04.5`	fixed
Ubuntu	ruby3.2-dev	noble	`3.2.3-1ubuntu0.24.04.5`	fixed
Ubuntu	ruby3.2-doc	noble	`3.2.3-1ubuntu0.24.04.5`	fixed
Alpine	ruby	3.19	`3.2.8-r0`	fixed
Alpine	ruby	3.20	`3.3.8-r0`	fixed
Alpine	ruby	3.21	`3.3.8-r0`	fixed
Alpine	ruby-net-imap	3.19	`0.3.9-r0`	fixed
Alpine	ruby-net-imap	3.20	`0.4.19-r0`	fixed
Alpine	ruby-net-imap	3.21	`0.4.19-r0`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	ruby3.1	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1103792]
Ubuntu	ruby3.2	deb	noble	`3.2.3-1ubuntu0.24.04.5`	Not reported	Not reported	Not reported
Ubuntu	libruby3.2	deb	noble	`3.2.3-1ubuntu0.24.04.5`	Not reported	Not reported	Not reported
Ubuntu	ruby3.2-dev	deb	noble	`3.2.3-1ubuntu0.24.04.5`	Not reported	Not reported	Not reported
Ubuntu	ruby3.2-doc	deb	noble	`3.2.3-1ubuntu0.24.04.5`	Not reported	Not reported	Not reported
Alpine	ruby	apk	3.19	`3.2.8-r0`	Not reported	ALPINE-CVE-2025-27219	Not reported
Alpine	ruby	apk	3.20	`3.3.8-r0`	Not reported	ALPINE-CVE-2025-27219	Not reported
Alpine	ruby	apk	3.21	`3.3.8-r0`	Not reported	ALPINE-CVE-2025-27219	Not reported
Alpine	ruby-net-imap	apk	3.19	`0.3.9-r0`	Not reported	ALPINE-CVE-2025-27219	Not reported
Alpine	ruby-net-imap	apk	3.20	`0.4.19-r0`	Not reported	ALPINE-CVE-2025-27219	Not reported
Alpine	ruby-net-imap	apk	3.21	`0.4.19-r0`	Not reported	ALPINE-CVE-2025-27219	Not reported

[Debian bug #1103792]

Notes

[bookworm] ruby3.1: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libruby3.1]Affected
Source package: [ruby3.1]
Details (4)
- 3.1.2-7+deb12u1 · amd64 · bookworm
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
- 3.1.2-7+deb12u1 · arm64 · bookworm
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
- 3.1.2-7+deb12u1 · amd64 · bookworm-security
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
- 3.1.2-7+deb12u1 · arm64 · bookworm-security
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
[ruby3.1]Affected
Details (4)
- 3.1.2-7+deb12u1 · amd64 · bookworm
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
- 3.1.2-7+deb12u1 · arm64 · bookworm
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
- 3.1.2-7+deb12u1 · amd64 · bookworm-security
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
- 3.1.2-7+deb12u1 · arm64 · bookworm-security
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
[ruby3.1-dev]Affected
Source package: [ruby3.1]
Details (4)
- 3.1.2-7+deb12u1 · amd64 · bookworm
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
- 3.1.2-7+deb12u1 · arm64 · bookworm
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
- 3.1.2-7+deb12u1 · amd64 · bookworm-security
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
- 3.1.2-7+deb12u1 · arm64 · bookworm-security
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
[ruby3.1-doc]Affected
Source package: [ruby3.1]
Details (4)
- 3.1.2-7+deb12u1 · all · bookworm
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
- 3.1.2-7+deb12u1 · all · bookworm
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
- 3.1.2-7+deb12u1 · all · bookworm-security
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
- 3.1.2-7+deb12u1 · all · bookworm-security
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12

[Debian 13 (Trixie)]

[libruby3.3]Fixed
Source package: [ruby3.3]
Details (2)
- 3.3.8-2 · amd64 · trixie
  Fixed · Fixed: 3.3.7-2
  usn · ruby3.3 · debian · 13
- 3.3.8-2 · arm64 · trixie
  Fixed · Fixed: 3.3.7-2
  usn · ruby3.3 · debian · 13
[ruby3.3]Fixed
Details (2)
- 3.3.8-2 · amd64 · trixie
  Fixed · Fixed: 3.3.7-2
  usn · ruby3.3 · debian · 13
- 3.3.8-2 · arm64 · trixie
  Fixed · Fixed: 3.3.7-2
  usn · ruby3.3 · debian · 13
[ruby3.3-dev]Fixed
Source package: [ruby3.3]
Details (2)
- 3.3.8-2 · amd64 · trixie
  Fixed · Fixed: 3.3.7-2
  usn · ruby3.3 · debian · 13
- 3.3.8-2 · arm64 · trixie
  Fixed · Fixed: 3.3.7-2
  usn · ruby3.3 · debian · 13
[ruby3.3-doc]Fixed
Source package: [ruby3.3]
Details (2)
- 3.3.8-2 · all · trixie
  Fixed · Fixed: 3.3.7-2
  usn · ruby3.3 · debian · 13
- 3.3.8-2 · all · trixie
  Fixed · Fixed: 3.3.7-2
  usn · ruby3.3 · debian · 13

Observed: Oct 26, 2026, 11:18:39 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]