Auth bypass in Getgrav Grav
CVE-2026-80204
The Grav API plugin (getgrav/grav-plugin-api) before 1.0.18 does not apply the API-key scope cap in the injectSecurityTab() function of BlueprintController when deciding whether a page's security/permissions blueprint section is editable. Because the function performs raw isSuperAdmin()/hasPermission() checks without a request parameter, it cannot enforce scopeAllows(). A caller holding a scoped API key may therefore see (and potentially edit) page permission fields beyond the scope granted to the key. The end-to-end write-time impact was not fully confirmed by the reporter.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (14.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 14.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/getgrav/grav/security/advisories/GHSA-mcx6-4rvg-7r8v (vendor-advisory)
- www.vulncheck.com/advisories/grav-before-1.0.18-authentication-bypass-via-scope… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-80204?
- CVE-2026-80204 is a medium-severity vulnerability in Getgrav Grav, classified under Incorrect Authorization. CVSS score: 5.4/10. Published 2026-08-26.
- How severe is CVE-2026-80204?
- Medium severity. CVSS v3 base score is 5.4 out of 10.