Is CVE-2026-62237 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-62237?

CVE-2026-62237 has a CVSS v3 severity of MEDIUM (6.5).

Back

CVE-2026-62237

Description

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.