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TI-2026-50934 Aliases CVE-2026-72696GHSA-cpcf-vm8j-257x

Grav CMS before 2.0.16 Symlink Following via createLockFile

Priority HIGH 72CWE-59Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Grav CMS before 2.0.16 contains a symlink following vulnerability in Scheduler Job::createLockFile() that allows local attackers to overwrite arbitrary files by pre-creating symlinks at predictable lock file paths in the world-writable temp directory. Attackers can place a symlink at the predictable lock path pointing to any file the web server process can write to, and the next scheduled job run will follow the symlink and overwrite the target file's content with the job ID string.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00204 10th percentileScored 2026-11-07
Fix Fixed grav (getgrav): 2.0.16

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

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
  • grav Vendorgetgrav Affected before 2.0.16 Fixed in 2.0.16 Patch available CNA

Remediation

  • Fix · CNA grav (getgrav) Fixed in 2.0.16

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-2026-53675 Grav before 2.0.16 Information Disclosure via offsetGetPriority HIGH 71
    Show all 8 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-72696
  2. 2026-10-03 Alias added: GHSA-cpcf-vm8j-257x

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