Critical [CVE-2026-76578] Ipa: freeipa: freeipa: unauthenticated ldap client can obtain administrator credentials via the self-managed-token aci
This critical-severity Red Hat Linux advisory covers CVE-2026-76578 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7.
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Summary
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. This is a Critical flaw allowing complete, unauthenticated compromise of a FreeIPA/IdM server's administrative privileges.
The technique originally disclosed impersonated the literal admin account via a canonical-name collision; a separate prior fix (CVE-2026-13097) now blocks that specific collision but does not address the underlying unauthenticated write access.
The attack still succeeds by having the anonymously-created principal added to the administrators group under an attacker-chosen name, reaching the same practical outcome.
Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; and 23 more.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation checklist
- Until a fixed package is available, restrict network access to the LDAP service (typically ports 389/636) to trusted hosts only, using firewall rules or network segmentation. Disabling anonymous LDAP binds blocks this specific attack path, though administrators should confirm this does not break other required anonymous-bind functionality in their deployment before applying it.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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