REXML has DoS condition when parsing malformed XML file

CVE-2025-58767 → View on GitHub ↗ View on CVE.org ↗ View on NVD ↗

Description

Impact

The REXML gems from 3.3.3 to 3.4.1 have a DoS vulnerability when parsing XML containing multiple XML declarations.
If you need to parse untrusted XMLs, you may be impacted to these vulnerabilities.

Patches

REXML gems 3.4.2 or later include the patches to fix these vulnerabilities.

Workarounds

Don't parse untrusted XMLs.

References

  • https://www.ruby-lang.org/en/news/2025/09/18/dos-rexml-cve-2025-58767/ : An announcement on www.ruby-lang.org

Basic information

Type
reviewed
Severity
low
Advisory on GitHub
Open advisory ↗
Repository advisory
Open repository advisory ↗
Source code
Browse source ↗
Published (advisory)
2025-09-17 18:26:48 UTC
Updated
2025-09-19 14:41:32 UTC
GitHub reviewed
2025-09-17 18:26:48 UTC
NVD published
2025-09-17

EPSS Score

Score Percentile
0.02% 5.96%

CVSS Scores

Base score Version Severity Vector
1.2 4.0 —
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U Click to expand
Attack vector (AV:L)
Attacker needs local access on the target system.
Attack complexity (AC:L)
Exploitation conditions are straightforward and stable.
Attack requirements (AT:N)
No additional preconditions are required beyond normal reachability.
Privileges required (PR:N)
No privileges are required.
User interaction (UI:N)
No user interaction is required.
Vulnerable system confidentiality impact (VC:N)
No confidentiality impact on the vulnerable system.
Vulnerable system integrity impact (VI:N)
No integrity impact on the vulnerable system.
Vulnerable system availability impact (VA:L)
Limited availability impact on the vulnerable system.
Subsequent system confidentiality impact (SC:N)
No confidentiality impact on subsequent systems.
Subsequent system integrity impact (SI:N)
No integrity impact on subsequent systems.
Subsequent system availability impact (SA:N)
No availability impact on subsequent systems.
Exploit maturity (threat) (E:U)
Unreported: no public PoC, no reported exploitation, and no known simplification tools.

Identifiers

Type Value
GHSA GHSA-c2f4-jgmc-q2r5 ↗
CVE CVE-2025-58767 ↗

CWEs

CWE id Name
CWE-400 Uncontrolled Resource Consumption
CWE-776 Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

Credits

  • sofiaaberegg (reporter)

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
rubygems rexml >= 3.3.3, <= 3.4.1 3.4.2 —

References

cvelogic Threat Intelligence