CVE-2026-86195 Details
Description
grav-plugin-api versions before 1.0.20 contain a privilege escalation vulnerability in the InvitationsController where the stripSuperFlags() method only removes nested super flags but fails to strip dot-keyed equivalents like api.super. A non-super user manager with api.access and api.users.write permissions can create an invitation with a dot-keyed super flag in the access payload that bypasses the guard and persists to the new account. Attackers can accept the invitation through the public endpoint without real invitee interaction to create a super-admin account and immediately receive a valid JWT for full site control.
A privilege escalation vulnerability has been identified in the Grav Plugin API, affecting versions prior to 1.0.20. The issue resides in the InvitationsController, specifically within the stripSuperFlags() method. This method is supposed to remove super flags from the access payload of invitations, but it only targets nested super flags and overlooks dot-keyed equivalents like 'api.super'. As a result, a non-super user manager with 'api.access' and 'api.users.write' permissions can create an invitation that includes a dot-keyed super flag, bypassing the intended safeguards. When the invitation is accepted through a public endpoint, the recipient is granted super-admin privileges and a valid JWT for full site control.
Users should upgrade to Grav Plugin API version 1.0.20 or later, and review pending invitations, as invitations can persist for up to seven days by default.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 5, 2026CISA-ADP
Assessed Sep 8, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/getgrav/grav/security/advisories/GHSA-m363-3hww-gcwc | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/getgrav/grav/security/advisories/GHSA-m363-3hww-gcwc | [email protected] | AdvisoryExploitRemedyVendor |
| https://www.vulncheck.com/advisories/grav-plugin-api-1.0.0-through-1.0.19-privilege-escalation-via-dot-keyed-super-flag | [email protected] | AdvisoryRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-269 | Improper Privilege Management | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Grav grav-plugin-api | <= 1.0.19 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 8, 2026 | CVE Modified | CISA-ADP |
| Sep 5, 2026 | New CVE Received | [email protected] |