Read the docs
TI-2026-53675 Aliases CVE-2026-76839GHSA-3jhr-mxmx-38cx

Grav before 2.0.16 Information Disclosure via offsetGet

Priority HIGH 71CWE-522Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-522.

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 objects to extract hashed passwords and 2FA secrets, enabling offline password cracking and authentication bypass.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00342 27th percentileScored 2026-11-07
Fix Fixed grav (getgrav): 2.0.16getgrav/grav (Packagist): 2.0.16

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
getgravgravbefore 2.0.162.0.16Patch availableCNA
—getgrav/grav (Packagist)before 2.0.162.0.16Patch availableGHSA-3jhr-mxmx-38cx
  • grav Vendorgetgrav Affected before 2.0.16 Fixed in 2.0.16 Patch available CNA
  • getgrav/grav (Packagist) Vendor— Affected before 2.0.16 Fixed in 2.0.16 Patch available GHSA-3jhr-mxmx-38cx

Remediation

  • Fix · CNA grav (getgrav) Fixed in 2.0.16
  • Fix · GHSA-3jhr-mxmx-38cx getgrav/grav (Packagist) Fixed in 2.0.16 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    getgrav grav 2.0.16

    8 records Highest priority Priority HIGH 4 HIGH, 3 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-50940 Grav CMS before 2.0.16 Origin Validation Bypass via RefererPriority HIGH 81
    • TI-2026-53682 Grav before 2.0.16 Information Disclosure via Twig SandboxPriority HIGH 77
    • TI-2026-50934 Grav CMS before 2.0.16 Symlink Following via createLockFilePriority HIGH 72
    Show all 8 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-76839
  2. 2026-10-03 Alias added: GHSA-3jhr-mxmx-38cx

References

Advisory 2

Other 1

  • TI-2026-30893 Grav: Privilege Escalation via Missing Server-Side Validation of groups/access CVSS 3.1CRITICAL 9.4
  • TI-2025-28971 Cross Site Scripting vulnerability in grav v.1.7.48 and before allows an attacker to… CVSS 3.1CRITICAL 9.8
  • TI-2021-04523 Unauthenticated Arbitrary YAML Write/Update leads to Code Execution CVSS 3.1CRITICAL 9.8
  • TI-2026-50940 Grav CMS before 2.0.16 Origin Validation Bypass via Referer CVSS 4.0CRITICAL 9.3
  • TI-2026-46446 Grav before 2.0.7 Remote Code Execution via Blueprint dynamicData CVSS 4.0CRITICAL 9.3
  • TI-2021-22428 GravCMS 1.10.7 - Arbitrary YAML Write/Update (Unauthenticated) (2) CVSS 4.0CRITICAL 9.3
See all 228 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences