CVE-2026-87853

תיאור (מקור, אנגלית)

A flaw was found in SSSD's IdP authentication provider. The eval_access_token_buf() function compares the OIDC subject identifier using strncmp() with the authenticated user's identifier length, performing a prefix comparison instead of an exact match. An attacker whose IdP identifier is a strict prefix of a target user's identifier can authenticate as the target user.

מדדים

CVSS 3.1

7.5 (HIGH) מקור הציון: CNA CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS — סבירות ניצול

0% (אחוזון 000) נכון ל-5/10/2026

CWE

CWE-187

קישורים

• https://access.redhat.com/security/cve/CVE-2026-87853
• https://bugzilla.redhat.com/show_bug.cgi?id=2530888