CVE-2026-62237
Grav < 2.0.4 ReDoS via regex_replace in Sandbox
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-1333 |
| Vendor | getgrav |
| Product | grav |
| Published | Jul 17, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
getgrav / grav
0 < 2.0.4
References
Credits
🔍 gemstone-source 🔍 drpr0grammer