CVE-2026-76578: Red Hat Enterprise Linux 10

Critical severity, CVSS 9.8. EPSS: 1% chance of exploitation in the next 30 days.

A flaw was found in FreeIPA. The self-managed OTP token ACI does not require authentication and does not restrict which attributes may be added alongside the token entry. An unauthenticated LDAP client can exploit this, combined with a related flaw in the underlying directory server's ACI evaluation (tracked separately), to create an arbitrary attacker-controlled Kerberos principal and have it added to the administrators group. This allows a remote, unauthenticated attacker to obtain genuine FreeIPA administrator-group membership and perform administrative operations against the directory and, on SID-enabled deployments, other IdM services.

Affected products

• Red Hat Red Hat Enterprise Linux 10: before 0:4.13.4-1.el10_2 (fixed in 0:4.13.4-1.el10_2)
• Red Hat Red Hat Enterprise Linux 6
• Red Hat Red Hat Enterprise Linux 7
• Red Hat Red Hat Enterprise Linux 8
• Red Hat Red Hat Enterprise Linux 9: before 0:4.13.4-1.el9_8 (fixed in 0:4.13.4-1.el9_8)

Published 2026-09-07. Last modified 2026-09-28.