Vulnerability in Getgrav Grav
CVE-2026-76839
Grav before 2.0.16 allows sandboxed Twig templates to access sensitive User fields through allow-listed offsetGet() and offsetexists() methods that lack field filtering. Attackers with page-edit permissions can call offsetGet() on User objects to extract hashed passwords and 2FA secrets, enabling offline password cracking and authentication bypass.
EPSS: 0.003 (19.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
Weakness classification (CWE)
References
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-76839?
- CVE-2026-76839 is a medium-severity vulnerability in Getgrav Grav, classified under Insufficiently Protected Credentials. CVSS score: 6.5/10. Published 2026-08-25.
- How severe is CVE-2026-76839?
- Medium severity. CVSS v3 base score is 6.5 out of 10.