CVE-2026-72537 Authentik Security authentik - Privilege Escalation
An attacker with a SCIM token can take over any user account, including superusers, by provisioning a user with a matching username.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-72537?
CVE-2026-72537 is a high-severity vulnerability in authentik, published on 11 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A privilege escalation vulnerability in Authentik Security authentik through 2026.5.6 allows an attacker with a source-scoped SCIM provisioning token to take over any user account including superusers by provisioning a SCIM user that matches an existing local user by username. The SCIM user ingest function adopts pre-existing local accounts by username without validating scope boundaries. An attacker can rewrite or delete any account, including the superuser, using only a limited provisioning credential.
Weakness: CWE-269
Which versions are affected by CVE-2026-72537?
How do I fix CVE-2026-72537?
No fix has been published for CVE-2026-72537 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-72537 being exploited?
There is no known exploitation of CVE-2026-72537 in the wild and no public exploit code.
Sources
Also known as GHSA-f25x-j567-ffxh.