---
id: CVE-2026-76839
title: >-
  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
summary: >-
  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 o…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-522
vendor: getgrav
product: grav
affected:
  - grav < 2.0.16
patched:
  - getgrav/grav 2.0.16
published: '2026-08-25'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T15:10:00.207'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-76839'
references:
  - url: 'https://github.com/getgrav/grav/security/advisories/GHSA-3jhr-mxmx-38cx'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/grav-before-information-disclosure-via-offsetget
    label: disclosure@vulncheck.com
  - url: 'https://github.com/getgrav/grav/security/advisories/GHSA-3jhr-mxmx-38cx'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-76839'
  - url: 'https://github.com/advisories/GHSA-3jhr-mxmx-38cx'
tags:
  - nvd
  - cve.org
  - exploit-available
  - ghsa
  - composer
epss: 0.00342
epssPercentile: 0.27534
aliases:
  - GHSA-3jhr-mxmx-38cx
ecosystem: composer
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-08-25T15:44:59.569951Z'
scores:
  nvd: 6.5
  ghsa: 7.7
ingestedAt: '2026-09-17T20:28:02.776Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-76839)

Affected packages:

- `getgrav/grav <= 2.0.15`

Patched in:

- `getgrav/grav 2.0.16`

Source: https://github.com/advisories/GHSA-3jhr-mxmx-38cx