Authentication Bypass by Capture-replay in SAML SSO - Service Provider - CVE-2026-87952
Published: September 11, 2026
Vulnerability identifier: #VU148969
CSH Severity: Low
CVSS v4: 2.3 [CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-87952
CWE-ID: CWE-294
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to the affected module does not sufficiently prevent reuse of previously accepted SAML assertions. A remote user can replay a valid assertion during its validity period, allowing repeated authentication attempts using the same assertion.
Affected software
SAML SSO - Service Provider
How to mitigate CVE-2026-87952
Install updates from vendor's website.
SAML SSO - Service Provider - update to 3.2.0