Auth bypass in Getgrav Grav
CVE-2026-56710
Grav Login plugin versions before 1.0.16 fail to validate the target account's privilege level in the onApiUserListRowAction unlock handler. An attacker with api.users.write permission can clear login lockout counters on admin.super accounts, removing brute-force protection from the highest-privilege accounts without requiring equivalent permissions.
Vulnerability class: Broken Access Control
EPSS: 0.003 (20.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
Weakness classification (CWE)
References
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-56710?
- CVE-2026-56710 is a critical-severity vulnerability in Getgrav Grav, classified under Incorrect Authorization. CVSS score: 9.8/10. Published 2026-08-25.
- How severe is CVE-2026-56710?
- Critical severity. CVSS v3 base score is 9.8 out of 10.