Read the docs
TI-2026-80088 Aliases CVE-2026-116019GHSA-8xfc-f7mm-8g34

Allowlist bypass in Grav Flex form overrides lets editors call methods

Priority MEDIUM 40CWE-749Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
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 from 2.0.15 before 2.2.13 contains an allowlist bypass that lets page editors call arbitrary public static methods. Attackers with page-edit permission can embed crafted fields in Flex form overrides in page frontmatter to invoke methods such as Folder::delete or Utils::download. This is tracked as CWE-749, and exploiting it can delete directories, overwrite files, or read files outside the page tree.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

Grav 2.0.15 before 2.2.13 contains an allowlist bypass vulnerability that allows page editors to invoke arbitrary public static methods by relocating data-*@ directives with unset-name@ or integer keys. Attackers with page-edit permission can embed crafted fields in Flex form overrides in page frontmatter to call methods like Folder::delete or Utils::download, deleting directories, overwriting files, or reading files outside the page tree.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00349 28th percentileScored 2026-11-07
Fix Fixed grav (getgrav): 2.2.13

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
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
getgravgrav2.0.15 to before 2.2.132.2.13Patch availableCNA
  • grav Vendorgetgrav Affected 2.0.15 to before 2.2.13 Fixed in 2.2.13 Patch available CNA

Remediation

Update Grav to version 2.2.13 or later.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA grav (getgrav) Fixed in 2.2.13

Timeline

  1. 2026-10-24 Threatist record created from CVE-2026-116019
  2. 2026-10-24 Alias added: GHSA-8xfc-f7mm-8g34
  3. 2026-10-25 Priority changed: MEDIUM → LOW
  4. 2026-10-26 CISA SSVC decision points changed
  5. 2026-10-26 Priority changed: LOW → MEDIUM

References

Patch 1

Advisory 1

Other 2

  • 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