Vulnerability DatabaseCVE-2026-46637
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CVE-2026-46637
Published:July 14, 2026
Updated:July 21, 2026
Twig is a template language for PHP. Prior to 3.26.0, several filters in twig/markdown-extra and twig/cssinliner-extra are registered with is_safe => [all], causing Twig to treat plain text or HTML output as safe in HTML, JavaScript, CSS, URL, and other contexts where the output is not properly escaped. This issue is fixed in version 3.26.0.
Affected Packages
twig/cssinliner-extra (PHP):
Affected version(s) >=v2.12.0 <v3.26.0
Fix Suggestion:
Update to version v3.26.0
twig/cssinliner-extra (PHP):
Affected version(s) >=v2.12.0 <v3.26.0
Fix Suggestion:
Update to version v3.26.0
twig/markdown-extra (PHP):
Affected version(s) >=v2.12.0 <v3.26.0
Fix Suggestion:
Update to version v3.26.0
twig/markdown-extra (PHP):
Affected version(s) >=v2.12.0 <v3.26.0
Fix Suggestion:
Update to version v3.26.0
Related Resources (8)
https://github.com/twigphp/Twig/commit/e36489d3521ecbfc08bdcc61294302557035f14a
https://symfony.com/cve-2026-46637
https://github.com/twigphp/Twig
https://github.com/twigphp/Twig/security/advisories/GHSA-jv8m-2544-3pg3
https://github.com/FriendsOfPHP/security-advisories/blob/master/twig/markdown-extra/CVE-2026-46637.yaml
https://github.com/twigphp/Twig/commit/84982072c79a7417b0d158a401d91344f3658299
https://github.com/twigphp/Twig/releases/tag/v3.26.0
https://github.com/FriendsOfPHP/security-advisories/blob/master/twig/cssinliner-extra/CVE-2026-46637.yaml
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CVSS v4
Base Score:
5.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
PASSIVE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
LOW
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
Exploit Maturity
UNREPORTED
CVSS v3
Base Score:
5.4
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Encoding or Escaping of Output
CWE-116
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-79
EPSS
Base Score:
0.18