What is the CVSS score of CVE-2025-10990?

CVE-2025-10990 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.1%.

Which versions of REXML. are affected by CVE-2025-10990?

CVE-2025-10990 affects REXML XML parsing libraries and could allow remote attackers to cause denial of service through maliciously crafted XML documents containing hex numeric character references.. A patch is available.

How to fix or mitigate CVE-2025-10990?

Within 24 hours: Identify all systems and applications using REXML library and document their internet/network exposure. Within 7 days: Implement input validation and rate limiting on XML processing endpoints; consider deploying WAF rules to block suspicious hex character reference patterns (&#x[0-9a-fA-F]+;). Within 30 days: Evaluate alternative XML parsing libraries or containerize/isolate vulnerable services; monitor vendor advisories for patch availability and plan immediate deployment upon release.

REXML. CVE-2025-10990

HIGH

Inefficient Regular Expression Complexity (ReDoS) (CWE-1333)

2026-02-27 secalert@redhat.com

Denial Of Service

7.5

CVSS 3.1 · Vendor: redhat

Severity by source

Vendor (redhat) PRIMARY

7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SUSE

HIGH

qualitative

Red Hat

7.5 MEDIUM

qualitative

Primary rating from Vendor (redhat).

CVSS VectorVendor: redhat

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

CVE Published

Feb 27, 2026 - 14:16 nvd

HIGH 7.5

DescriptionCVE.org

A flaw was found in REXML. A remote attacker could exploit inefficient regular expression (regex) parsing when processing hex numeric character references (&#x...;) in XML documents. This could lead to a Regular Expression Denial of Service (ReDoS), impacting the availability of the affected component. This issue is the result of an incomplete fix for CVE-2024-49761.

AnalysisAI

A flaw was found in REXML. A remote attacker could exploit inefficient regular expression (regex) parsing when processing hex numeric character references (&#x...;) in XML documents. [CVSS 7.5 HIGH]

Technical ContextAI

Classified as CWE-1333 (Inefficient Regular Expression Complexity (ReDoS)). A flaw was found in REXML. A remote attacker could exploit inefficient regular expression (regex) parsing when processing hex numeric character references (&#x...;) in XML documents. This could lead to a Regular Expression Denial of Service (ReDoS), impacting the availability of the affected component. This issue is the result of an incomplete fix for CVE-2024-49761.