Vulnerability · Published Aug 26, 2026 · Assigned by VulnCheck

CVE-2026-80204Grav before 1.0.18 Authentication Bypass via Scoped API Key

Medium 5.4

In plain English

A medium-severity incorrect authorization in grav from getgrav. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.2%top 84.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
getgrav	grav	0 – before 1.0.18

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

References

GitHub Security Advisory (GHSA-mcx6-4rvg-7r8v) vendor-advisory
VulnCheck Advisory: Grav before 1.0.18 Authentication Bypass via Scoped API Key third-party-advisory