CVE-2026-82465

MediumCVSS 5.3/10Last modified Sep 10, 2026

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.

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Weakness enumeration

CWE-345

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

Vendor	Product	Versions
pac4j	pac4j	< 6.5.6

References

Timeline

Published: Aug 29, 2026
Last modified: Sep 10, 2026
NVD status: Awaiting Analysis

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