Medium severity · published Aug 26, 2026
CVE-2026-80204
Grav before 1.0.18 Authentication Bypass via Scoped API Key
5.4
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
grav · getgrav
before 1.0.18 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-80204
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-80204
github.com
https://github.com/getgrav/grav/security/advisories/GHSA-mcx6-4rvg-7r8v
www.vulncheck.com
https://www.vulncheck.com/advisories/grav-before-1.0.18-authentication-bypass-via-scoped-api-key-2
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