CVE-2026-46637 PUBLISHED

Twig: HTML-output filters in twig/* extras incorrectly declared `is_safe => ['all']`

Assigner: GitHub_M
Reserved: 15.05.2026 Published: 14.07.2026 Updated: 14.07.2026

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.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
CVSS Score: 5.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	Low
Attack Complexity	Low	Integrity	None	Integrity	Low
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	Low
User Interaction	Passive

CVSS 4.0

Product Status

Vendor	twigphp
Product	Twig
Versions	Version < 3.26.0 is affected

Vendor	twig
Product	cssinliner-extra
Versions	Version < 3.26.0 is affected

Vendor	twig
Product	markdown-extra
Versions	Version < 3.26.0 is affected

References

Problem Types

CWE-116: Improper Encoding or Escaping of Output CWE