What’s Vulnerable › Vulnerabilities

CVE-2026-80203: Grav before 1.0.18 Authentication Bypass via Scoped API Key

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-26 · updated 2026-09-03
• Weakness: CWE-863

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.

Affected products

• getgrav grav: before 1.0.18 — fixed in 1.0.18

How to fix

Upgrade to a fixed version: getgrav grav 1.0.18. Check the vendor advisory for mitigations.

References

• https://github.com/getgrav/grav/security/advisories/GHSA-94q7-vrqr-cx5v
• https://www.vulncheck.com/advisories/grav-before-1.0.18-authentication-bypass-via-scoped-api-key

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