Vulnerability · Published Jul 23, 2026 · Assigned by VulnCheck

CVE-2026-65897Grav API Plugin 1.0.9 Privilege Escalation via Invitations groups

High 8.8

In plain English

A high-severity privilege mismanagement in grav from getgrav. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.5%top 60.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Grav API Plugin versions before 1.0.10 fail to validate the groups field in InvitationsController::create(), allowing authenticated api.users.write callers to assign invited accounts to groups that grant api.super permissions. Attackers can create invitation records with elevated group membership, and when accepted, the new account gains full super-admin API access without the inviter holding those permissions.

Affected products (as reported)

Vendor	Product	Versions
getgrav	grav	0 – before 1.0.10

Weakness: CWE-269 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

GitHub Security Advisory (GHSA-m86m-jjcg-gcvv) vendor-advisory
Patch Commit patch
Patch Commit patch
VulnCheck Advisory: Grav API Plugin 1.0.9 Privilege Escalation via Invitations groups third-party-advisory