CVE-2026-62237

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/getgrav/grav/security/advisories/GHSA-37f3-6p89-6qr9
https://www.vulncheck.com/advisories/grav-redos-via-regex-replace-in-sandbox
https://github.com/getgrav/grav/security/advisories/GHSA-37f3-6p89-6qr9

Configurations

No configuration.

History

No history.

Information

Published : 2026-07-17 02:18

Updated : 2026-07-21 02:16

NVD link : CVE-2026-62237

Mitre link : CVE-2026-62237

CVE.ORG link : CVE-2026-62237

JSON object : View

Products Affected

No product.

CWE

CWE-1333

Inefficient Regular Expression Complexity

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