Vulnerability Description
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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/getgrav/grav/security/advisories/GHSA-3jhr-mxmx-38cx
- https://www.vulncheck.com/advisories/grav-before-information-disclosure-via-offs
- https://github.com/getgrav/grav/security/advisories/GHSA-3jhr-mxmx-38cx
FAQ
What is CVE-2026-76839?
CVE-2026-76839 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 permi...
How severe is CVE-2026-76839?
CVE-2026-76839 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-76839?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.