CVE catalog

CVE-2024-43398

Ruby vulnerabilities

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Aug 21, 2024, 10:00:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 1.21% · Oct 25, 2026

REXML is an XML toolkit for Ruby. The REXML gem before 3.3.6 has a DoS vulnerability when it parses an XML that has many deep elements that have same local name attributes. If you need to parse untrusted XMLs with tree parser API like REXML::Document.new, you may be impacted to this vulnerability. If you use other parser APIs such as stream parser API and SAX2 parser API, this vulnerability is not affected. The REXML gem 3.3.6 or later include the patch to fix the vulnerability.

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-rexml	3.19	`3.3.9-r0`	fixed
Alpine	ruby-rexml	3.20	`3.3.9-r0`	fixed
Alpine	ruby-rexml	3.21	`3.3.9-r0`	fixed
Alpine	ruby-rexml	3.22	`3.3.9-r0`	fixed
Alpine	ruby-rexml	3.23	`3.3.9-r0`	fixed
Alpine	ruby-rexml	3.24	`3.3.9-r0`	fixed
Ubuntu	ruby2.3	pro	`2.3.0-1`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.0-2`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.0-4ubuntu2`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.0-4ubuntu3`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.0-5ubuntu1`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~16.04`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~16.04.2`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~16.04.4`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~16.04.5`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~16.04.6`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~16.04.7`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~16.04.9`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~16.04.10`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~16.04.11`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~16.04.12`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~ubuntu16.04.13`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~ubuntu16.04.14`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~ubuntu16.04.15`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~ubuntu16.04.16`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~ubuntu16.04.16+esm1`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~ubuntu16.04.16+esm2`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~ubuntu16.04.16+esm3`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~ubuntu16.04.16+esm4`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~ubuntu16.04.16+esm5`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~ubuntu16.04.16+esm6`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~ubuntu16.04.16+esm7`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~ubuntu16.04.16+esm8`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~ubuntu16.04.16+esm9`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~ubuntu16.04.16+esm10`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~ubuntu16.04.16+esm11`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~ubuntu16.04.16+esm12`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~ubuntu16.04.16+esm14`	vulnerable
Ubuntu	ruby2.3	pro	`2.3.1-2~ubuntu16.04.16+esm15`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.0~preview1-1ubuntu2`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.0-4ubuntu1`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.0-4ubuntu4`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.0-5ubuntu1`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.0-6ubuntu1`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.1-1ubuntu1`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.1-1ubuntu1.1`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.1-1ubuntu1.2`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.1-1ubuntu1.4`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.1-1ubuntu1.5`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.1-1ubuntu1.6`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.1-1ubuntu1.7`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.1-1ubuntu1.8`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.1-1ubuntu1.9`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.1-1ubuntu1.10`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.1-1ubuntu1.11`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.1-1ubuntu1.12`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.1-1ubuntu1.13`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.1-1ubuntu1.14`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.1-1ubuntu1.15`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.1-1ubuntu1.16`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.1-1ubuntu1.16+esm1`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.1-1ubuntu1.16+esm3`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.1-1ubuntu1.16+esm4`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.1-1ubuntu1.16+esm5`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.1-1ubuntu1.16+esm6`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.1-1ubuntu1.16+esm7`	vulnerable
Ubuntu	ruby2.5	pro	`2.5.1-1ubuntu1.16+esm8`	vulnerable
Ubuntu	ruby2.7	20.04	`2.7.0-1`	vulnerable
Ubuntu	ruby2.7	20.04	`2.7.0-2`	vulnerable
Ubuntu	ruby2.7	20.04	`2.7.0-3`	vulnerable
Ubuntu	ruby2.7	20.04	`2.7.0-4`	vulnerable
Ubuntu	ruby2.7	20.04	`2.7.0-4ubuntu1`	vulnerable
Ubuntu	ruby2.7	20.04	`2.7.0-5ubuntu1`	vulnerable
Ubuntu	ruby2.7	20.04	`2.7.0-5ubuntu1.1`	vulnerable
Ubuntu	ruby2.7	20.04	`2.7.0-5ubuntu1.2`	vulnerable
Ubuntu	ruby2.7	20.04	`2.7.0-5ubuntu1.3`	vulnerable
Ubuntu	ruby2.7	20.04	`2.7.0-5ubuntu1.4`	vulnerable
Ubuntu	ruby2.7	20.04	`2.7.0-5ubuntu1.5`	vulnerable
Ubuntu	ruby2.7	20.04	`2.7.0-5ubuntu1.6`	vulnerable
Ubuntu	ruby2.7	20.04	`2.7.0-5ubuntu1.7`	vulnerable
Ubuntu	ruby2.7	20.04	`2.7.0-5ubuntu1.8`	vulnerable
Ubuntu	ruby2.7	20.04	`2.7.0-5ubuntu1.9`	vulnerable
Ubuntu	ruby2.7	20.04	`2.7.0-5ubuntu1.10`	vulnerable
Ubuntu	ruby2.7	20.04	`2.7.0-5ubuntu1.11`	vulnerable
Ubuntu	ruby2.7	20.04	`2.7.0-5ubuntu1.12`	vulnerable
Ubuntu	ruby2.7	20.04	`2.7.0-5ubuntu1.13`	vulnerable
Ubuntu	ruby2.7	20.04	`2.7.0-5ubuntu1.14`	vulnerable
Ubuntu	ruby2.7	20.04	`2.7.0-5ubuntu1.15`	vulnerable
Ubuntu	ruby2.7	20.04	`2.7.0-5ubuntu1.16`	fixed
Ubuntu	ruby3.0	22.04	`3.0.2-5ubuntu1`	vulnerable
Ubuntu	ruby3.0	22.04	`3.0.2-7`	vulnerable
Ubuntu	ruby3.0	22.04	`3.0.2-7ubuntu2`	vulnerable
Ubuntu	ruby3.0	22.04	`3.0.2-7ubuntu2.1`	vulnerable
Ubuntu	ruby3.0	22.04	`3.0.2-7ubuntu2.2`	vulnerable
Ubuntu	ruby3.0	22.04	`3.0.2-7ubuntu2.3`	vulnerable
Ubuntu	ruby3.0	22.04	`3.0.2-7ubuntu2.4`	vulnerable
Ubuntu	ruby3.0	22.04	`3.0.2-7ubuntu2.5`	vulnerable
Ubuntu	ruby3.0	22.04	`3.0.2-7ubuntu2.6`	vulnerable
Ubuntu	ruby3.0	22.04	`3.0.2-7ubuntu2.7`	vulnerable
Ubuntu	ruby3.0	22.04	`3.0.2-7ubuntu2.8`	vulnerable
Ubuntu	ruby3.0	22.04	`3.0.2-7ubuntu2.10`	fixed
Ubuntu	ruby3.2	24.04	`3.2.3-1`	vulnerable
Ubuntu	ruby3.2	24.04	`3.2.3-1build2`	vulnerable
Ubuntu	ruby3.2	24.04	`3.2.3-1build3`	vulnerable
Ubuntu	ruby3.2	24.04	`3.2.3-1ubuntu0.24.04.1`	vulnerable
Ubuntu	ruby3.2	24.04	`3.2.3-1ubuntu0.24.04.3`	vulnerable
Ubuntu	ruby3.2	24.04	`3.2.3-1ubuntu0.24.04.5`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	ruby3.1	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1083190]
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-rexml	apk	3.19	`3.3.9-r0`	Not reported	ALPINE-CVE-2024-43398	Not reported
Alpine	ruby-rexml	apk	3.20	`3.3.9-r0`	Not reported	ALPINE-CVE-2024-43398	Not reported
Alpine	ruby-rexml	apk	3.21	`3.3.9-r0`	Not reported	ALPINE-CVE-2024-43398	Not reported
Alpine	ruby-rexml	apk	3.22	`3.3.9-r0`	Not reported	ALPINE-CVE-2024-43398	Not reported
Alpine	ruby-rexml	apk	3.23	`3.3.9-r0`	Not reported	ALPINE-CVE-2024-43398	Not reported
Alpine	ruby-rexml	apk	3.24	`3.3.9-r0`	Not reported	ALPINE-CVE-2024-43398	Not reported
Ubuntu	ruby2.7	deb	20.04	`2.7.0-5ubuntu1.16`	Not reported	UBUNTU-CVE-2024-43398	Not reported
Ubuntu	ruby3.0	deb	22.04	`3.0.2-7ubuntu2.10`	Not reported	UBUNTU-CVE-2024-43398	Not reported
Ubuntu	ruby3.2	deb	24.04	`3.2.3-1ubuntu0.24.04.5`	Not reported	UBUNTU-CVE-2024-43398	Not reported

[Debian bug #1083190]

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: 3.3.5-1
  usn · ruby3.3 · debian · 13
- 3.3.8-2 · arm64 · trixie
  Fixed · Fixed: 3.3.5-1
  usn · ruby3.3 · debian · 13
[ruby3.3]Fixed
Details (2)
- 3.3.8-2 · amd64 · trixie
  Fixed · Fixed: 3.3.5-1
  usn · ruby3.3 · debian · 13
- 3.3.8-2 · arm64 · trixie
  Fixed · Fixed: 3.3.5-1
  usn · ruby3.3 · debian · 13
[ruby3.3-dev]Fixed
Source package: [ruby3.3]
Details (2)
- 3.3.8-2 · amd64 · trixie
  Fixed · Fixed: 3.3.5-1
  usn · ruby3.3 · debian · 13
- 3.3.8-2 · arm64 · trixie
  Fixed · Fixed: 3.3.5-1
  usn · ruby3.3 · debian · 13
[ruby3.3-doc]Fixed
Source package: [ruby3.3]
Details (2)
- 3.3.8-2 · all · trixie
  Fixed · Fixed: 3.3.5-1
  usn · ruby3.3 · debian · 13
- 3.3.8-2 · all · trixie
  Fixed · Fixed: 3.3.5-1
  usn · ruby3.3 · debian · 13

Observed: Oct 27, 2026, 2:20:24 AM 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)]