CVEvulnerability
CVE-2026-82465
6.9 MEDIUM
Official page ↗
- Status
- Awaiting Analysis
- Published
- 2026-08-29
- Last modified
- 2026-09-10
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 6.9 MEDIUM — CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- CVSS 3.1 ([email protected])
- 5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Weaknesses
- CWE-345
Description
pac4j-saml before 6.5.6 does not require signature validation of SAML LogoutRequest messages in SAML2LogoutValidator.validateLogoutRequest(). When an IdP sends no SessionIndex, a session can be destroyed based solely on the NameID, allowing an unauthenticated attacker to submit an unsigned LogoutRequest with a guessed identifier (e.g., an email address used as NameID) to terminate a victim's SAML session.
Related
Weakness · CWE (1)
- CWE-345 Insufficient Verification of Data Authenticity weakness
References
- https://github.com/pac4j/pac4j github.com
- https://github.com/pac4j/pac4j/blob/pac4j-parent-6.5.5/pac4j-saml/src/main/java/org/pac4j/saml/logout/impl/SAML2LogoutValidator.java github.com
- https://github.com/pac4j/pac4j/commit/2270c3ff70e93cc43831e75702acd5135531237e github.com
- https://www.pac4j.org/blog/security-advisory-pac4j-core-oidc-saml.html www.pac4j.org
- https://www.vulncheck.com/advisories/pac4j-saml-before-6.5.6-session-destruction-via-unsigned-logoutrequest www.vulncheck.com