CVE-2026-62237

Medium

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.

SeverityMedium

CVSS6.5

Exploit probability—

ProductGetgrav/grav

PublishedJul 17, 2026

First seenJul 17, 2026

Weakness typeCWE-1333CWE-1333

How to fix

Update

getgrav/grav2.0.4 or later

Vendor advisories

github.com/getgrav/grav/security/advisories/GHSA-37f3-6p89-6qr9

Affected products

Product	Affected versions	Fixed in
getgrav/gravPackagist	v < 2.0.4	2.0.4

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