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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (25.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 25.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/getgrav/grav/security/advisories/GHSA-3jhr-mxmx-38cx (vendor-advisory)
- www.vulncheck.com/advisories/grav-before-information-disclosure-via-offsetget (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.