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

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

• CISA KEV Not listed.
• EPSS 0.0031, the 23rd percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 31 Oct 2026, 13:58 UTC First seen by agentprime
2. 31 Oct 2026, 13:58 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-jv8m-2544-3pg3
• OSV: GHSA-jv8m-2544-3pg3
• github.com/twigphp/Twig/security/advisories/GHSA-jv8m-2544-3pg3
• github.com/FriendsOfPHP/security-advisories/blob/master/twig/cssinliner-extra/CVE-2026-46637.yaml
• github.com/FriendsOfPHP/security-advisories/blob/master/twig/markdown-extra/CVE-2026-46637.yaml
• github.com/twigphp/Twig
• symfony.com/cve-2026-46637

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.