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Vulnerability record · CVE-2026-65897 · published 23 July 2026

CVE-2026-65897: Improper privilege management vulnerability

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.

8.7 CVSS 4.0 High EPSS 0.52% · top 57.9% CWE-269 · Improper privilege management Deferred
8.7CVSS 4.0 base score
0.52%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
28 Aug 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/getgrav/grav-plugin-api/commit/f9438d4e71389b1041ac60b69b0b5714ecfa3bdd
https://github.com/getgrav/grav/commit/345e79e3abf8c15f80e612a09f6643300071324b
https://github.com/getgrav/grav/security/advisories/GHSA-m86m-jjcg-gcvv
https://www.vulncheck.com/advisories/grav-api-plugin-privilege-escalation-via-invitations-groups
https://github.com/getgrav/grav/security/advisories/GHSA-m86m-jjcg-gcvv

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Source: NIST National Vulnerability Database (record CVE-2026-65897), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.