CVE-2026-76839CWE-522

CVE-2026-76839

Medium · published August 25, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
26.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
8.7 · 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
EPSS
0.00342 · 26.5th percentile
Weakness
CWE-522 · Insufficiently Protected Credentials
Published
2026-08-25T06:16Z
References (3)
https://github.com/getgrav/grav/security/advisories/GHSA-3jhr-mxmx-38cx · [email protected]https://www.vulncheck.com/advisories/grav-before-information-disclosure-via-offsetget · [email protected]https://github.com/getgrav/grav/security/advisories/GHSA-3jhr-mxmx-38cx · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 26 AUG 08:27Z
    EPSS moved — → 0%
    epss
  • 25 AUG 01:30Z
    Grav before 2.0.16 Information Disclosure via offsetGet
    cvelistv5