CVE-2026-76839
Grav before 2.0.16 Information Disclosure via offsetGet
- State
- Published
- Severity
- 8.7 High
- Published
- Aug 25, 2026
- Updated
- Oct 8, 2026
- Reserved
- Aug 19, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N | VulnCheck |
Weaknesses
- CWE-522 Insufficiently Protected Credentials
Affected Products
| Product | Versions |
|---|---|
gravgetgrav |
|
References
- GitHub Security Advisory (GHSA-3jhr-mxmx-38cx)vendor-advisory
- VulnCheck Advisory: Grav before 2.0.16 Information Disclosure via offsetGetthird-party-advisory
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