CVE-2025-58767

REXML has a DoS condition when parsing malformed XML file

MEDIUM
5.3
CVSS Score
Published: September 17, 2025 at 05:45 PM UTC
Updated: June 17, 2026 at 09:44 AM UTC
2 products affected across 2 vendorsRexmlREXML

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

REXML is an XML toolkit for Ruby. The REXML gems from 3.3.3 to 3.4.1 has a DoS vulnerability when parsing XML containing multiple XML declarations. If you need to parse untrusted XMLs, you may be impacted to these vulnerabilities. The REXML gem 3.4.2 or later include the patches to fix these vulnerabilities.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

3.3.3 ≤ v < 3.4.2
v < 3.4.2
Affected range stops below 3.4.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusANALYZED
CWE
CWE-400

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