CVE-2026-80203 Grav before 1.0.18 Authentication Bypass via Scoped API Key
Attackers with scoped API keys can bypass authorization checks to modify or delete other super-admin accounts in Grav CMS.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-80203?
CVE-2026-80203 is a critical authentication bypass vulnerability in getgrav grav, published on 26 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The getgrav/grav-plugin-api plugin before 1.0.18 does not enforce API-key scope in the requireNotSuperTarget() function in UsersController.php across seven sensitive user-management endpoints. The check uses isSuperAdmin() on the acting account rather than verifying whether the specific API key carries super authority (via isSuperWithinScope()). As a result, an API key scoped below full super authority but belonging to a super-admin account can act against other super-admin accounts—disabling their 2FA, deleting their avatar, minting new API keys under their identity, or deleting their existing API keys.
Weakness: CWE-863
Which versions are affected by CVE-2026-80203?
How do I fix CVE-2026-80203?
No fix has been published for CVE-2026-80203 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-80203 being exploited?
There is no known exploitation of CVE-2026-80203 in the wild and no public exploit code.
Sources
Also known as GHSA-jqh9-6gqv-p52m.