CVE-2026-76578 Ipa: freeipa: freeipa: unauthenticated ldap client can obtain administrator credentials via the self-managed-token aci
Unauthenticated attackers can bypass authentication to create admin principals and gain full administrative control over the FreeIPA directory.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-76578?
CVE-2026-76578 is a critical authentication bypass vulnerability in Red Hat Enterprise Linux 10, published on 7 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-306
Which versions are affected by CVE-2026-76578?
How do I fix CVE-2026-76578?
Apply the vendor's patch.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-76578 being exploited?
There is no known exploitation of CVE-2026-76578 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as DEBIAN-CVE-2026-76578, GHSA-cgrx-2q4j-9f37, UBUNTU-CVE-2026-76578.