OCTOBER 21, 2026
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Case File

CVE-2026-97791

HIGH · CVSS 7.5 EPSS 0.25%

Source: NVD + CISA KEV + EPSS · Published 2026-10-09 · Last synced 2026-10-20

CyberRota Analysis

AI-Generated

Apache CXF is vulnerable due to a flaw in the STSTokenValidator, which improperly shares the validation results of SAML assertions across requests. This allows a remote, unauthenticated attacker to exploit the system by sending a forged assertion signed with an untrusted certificate, potentially gaining unauthorized access to services that do not enforce strict validation. Organizations utilizing affected versions of Apache CXF should prioritize upgrading to versions 4.2.4, 4.1.9, or 3.6.13 to mitigate this risk.

CVE
CVE-2026-97791
Severity
HIGH
CVSS
7.5
EPSS
0.25%
Apache

Original NVD 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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)