---
id: CVE-2026-62672
title: Grav is a file-based Web platform
summary: >-
  Grav is a file-based Web platform. Prior to 2.0.4, Grav allowlists the
  regex_replace filter and function in system/config/security.yaml, and
  GravExtension::regexReplace() passes an editor-controlled pattern directly to
  preg_replace(). Wh…
severity: medium
cvss: 6
cvssVector: 'CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'
cwe:
  - CWE-1333
vendor: getgrav
product: grav
affected:
  - grav < 2.0.4
published: '2026-08-19'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:13:25.910'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-62672'
references:
  - url: >-
      https://github.com/getgrav/grav/commit/907116268ad4f48be7472c57f64981918578599a
    label: security-advisories@github.com
  - url: 'https://github.com/getgrav/grav/releases/tag/2.0.4'
    label: security-advisories@github.com
  - url: 'https://github.com/getgrav/grav/security/advisories/GHSA-37f3-6p89-6qr9'
    label: security-advisories@github.com
  - url: 'https://github.com/getgrav/grav/security/advisories/GHSA-37f3-6p89-6qr9'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-62672'
  - url: 'https://github.com/advisories/GHSA-37f3-6p89-6qr9'
tags:
  - nvd
  - cve.org
  - exploit-available
  - ghsa
  - composer
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-08-19T18:00:33.930663Z'
cvssSource: cna
ingestedAt: '2026-09-12T15:50:22.697Z'
epss: 0.00381
epssPercentile: 0.29317
aliases:
  - GHSA-37f3-6p89-6qr9
ecosystem: composer
patched:
  - getgrav/grav 2.0.4
---

## Overview

Grav is a file-based Web platform. Prior to 2.0.4, Grav allowlists the regex_replace filter and function in system/config/security.yaml, and GravExtension::regexReplace() passes an editor-controlled pattern directly to preg_replace(). When security.twig_content.process_enabled is enabled, an authenticated page editor can publish a catastrophically backtracking pattern that consumes PHP worker CPU and denies service to site visitors. This issue is fixed in version 2.0.4.

## Remediation

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

## Package advisory (CVE-2026-62672)

Affected packages:

- `getgrav/grav < 2.0.4`

Patched in:

- `getgrav/grav 2.0.4`

Source: https://github.com/advisories/GHSA-37f3-6p89-6qr9