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TI-2026-44460 Aliases CVE-2026-62237GHSA-6gqg-9qjp-56jm

Grav < 2.0.4 ReDoS via regex_replace in Sandbox

Priority MEDIUM 60CWE-1333Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-1333.

Summary

Grav before 2.0.4 contains a regular expression denial of service (ReDoS) vulnerability in the regex_replace filter and function, which are allowlisted in the Twig content sandbox. When Twig processing in page content is enabled (security.twig_content.process_enabled: true, disabled by default), an authenticated page editor can supply a catastrophically backtracking PCRE pattern that is passed directly to PHP's preg_replace(), causing unbounded CPU consumption and denial of service to the web server process.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00301 22nd percentileScored 2026-11-07
Fix Fixed grav (getgrav): 2.0.4

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 2.0.42.0.4Patch availableCNA
  • grav Vendorgetgrav Affected before 2.0.4 Fixed in 2.0.4 Patch available CNA

Remediation

  • Fix · CNA grav (getgrav) Fixed in 2.0.4

Fixed in the same release

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

  • Release ·

    getgrav grav 2.0.4

    4 records Highest priority Priority HIGH 3 HIGH, 1 MEDIUM

    Other records, highest priority first

    • TI-2026-44453 Grav < 2.0.4 File Access Bypass via Case VariationPriority HIGH 77
    • TI-2026-44455 Grav < 2.0.4 2FA Bypass via Secret RegenerationPriority HIGH 74
    • TI-2026-44457 Grav < 2.0.4 SSRF via Unrestricted cURL ProtocolsPriority HIGH 70
    Show all 4 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-62237
  2. 2026-10-03 Alias added: GHSA-6gqg-9qjp-56jm

References

Advisory 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