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  4. CVE 2026 97791 apache cxf ststokenvalidator can accept untrusted
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Back to active CVEs
High · CVSS 7.5CVE-2026-97791

Apache CXF: STSTokenValidator can accept untrusted SAML assertions because it shares validation state between requestsCVE-2026-97791

Answer in brief

CVE-2026-97791 records a High severity (CVSS 7.5) vulnerability in Apache CXF: STSTokenValidator can accept untrusted SAML assertions because it shares validation state between requests. The current sources do not mark it as known exploited. The current feed maps Apache Software Foundation/org.apache.cxf:cxf-rt-ws-security (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 9, 2026Updated Oct 15, 2026Source checked Oct 25, 2026First seen by HOL Oct 9, 2026Material review Oct 15, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.5
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Apache Software Foundation/org.apache.cxf:cxf-rt-ws-security (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Apache Software Foundation/org.apache.cxf:cxf-rt-ws-securitygeneric>=4.2.0 <4.2.4 || >=4.0.0 <4.1.9 || >=0 <3.6.134.2.4, 4.1.9, 3.6.13

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Apache Software Foundation/org.apache.cxf:cxf-rt-ws-security.
  2. 2Review the reported fix. Update Apache Software Foundation/org.apache.cxf:cxf-rt-ws-security to 4.2.4 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 9, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 15, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 9, 2026

Sources and claim methodology

  • Source referencelists.apache.org
  • Source referenceopenwall.com
Upstream source description

In Apache CXF, STSTokenValidator checks whether a SAML assertion is signed by a trusted certificate before deciding to send it to the STS. That result was stored in one object shared by all requests, so one request could read another's result. A remote, unauthenticated attacker could send a forged assertion signed with an untrusted certificate while legitimate requests were being processed, and it could be accepted as trusted without ever reaching the STS. Only services that use STSTokenValidator to validate SAML tokens without alwaysValidateToSts set are affected.  Users are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-362
Source
CVE List V5
Source checked
Oct 25, 2026
References
2 linked sources
Open source record