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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2026-97791

Apache CXF: STSTokenValidator can accept untrusted SAML assertions because it shares validation state between requests

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Status
Published
Published
Updated
Assigning organization
apache

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Apache Software Foundation Apache CXF

Default version status: unaffected

  • 4.2.0 to < 4.2.4affected
  • 4.0.0 to < 4.1.9affected
  • 0 to < 3.6.13affected
pkg:maven/org.apache.cxf/cxf-rt-ws-security

References