What is CVE-2026-66400?

CVE-2026-66400 is a medium-severity vulnerability in Getgrav Grav, classified under Insufficient Session Expiration. CVSS score: 4.8/10. Published 2026-07-29.

How severe is CVE-2026-66400?

Medium severity. CVSS v3 base score is 4.8 out of 10.

Vulnerability in Getgrav Grav

CVE-2026-66400

Grav Login Plugin versions before 3.8.13 contain an insufficient session expiration vulnerability in TokenStorage.php where the findTriplet() method fails to properly validate Remember Me token timestamps. Attackers with a captured Remembe…

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Getgrav Grav — versions 0, 3.8.13

Weakness classification (CWE)

CWE-613 — Insufficient Session Expiration

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-66400?: CVE-2026-66400 is a medium-severity vulnerability in Getgrav Grav, classified under Insufficient Session Expiration. CVSS score: 4.8/10. Published 2026-07-29.
How severe is CVE-2026-66400?: Medium severity. CVSS v3 base score is 4.8 out of 10.