medium6.0
CVE-2026-62672
Grav: Authenticated ReDoS via regex_replace in Twig Sandbox
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| composer | getgrav/grav | < 2.0.4 | 2.0.4 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-37f3-6p89-6qr9
- https://github.com/getgrav/grav/security/advisories/GHSA-37f3-6p89-6qr9
- https://nvd.nist.gov/vuln/detail/CVE-2026-62672
- https://github.com/getgrav/grav/commit/907116268ad4f48be7472c57f64981918578599a
- https://github.com/getgrav/grav/releases/tag/2.0.4