What’s Vulnerable › Vulnerabilities

CVE-2022-39261: Twig may load a template outside a configured directory when using the filesystem loader

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-09-28 · updated 2026-06-17
• Weakness: CWE-22

Description

Twig is a template language for PHP. Versions 1.x prior to 1.44.7, 2.x prior to 2.15.3, and 3.x prior to 3.4.3 encounter an issue when the filesystem loader loads templates for which the name is a user input. It is possible to use the `source` or `include` statement to read arbitrary files from outside the templates' directory when using a namespace like `@somewhere/../some.file`. In such a case, validation is bypassed. Versions 1.44.7, 2.15.3, and 3.4.3 contain a fix for validation of such template names. There are no known workarounds aside from upgrading.

Affected products

• Debian Linux: 10.0, 11.0
• Drupal: from 8.0.0 before 9.3.22; from 9.4.0 before 9.4.7 — fixed in 9.3.22, 9.4.7
• Fedoraproject Fedora: 35, 36, 37
• twigphp Twig: from 1.0.0 before 1.44.7; from 2.0.0 before 2.15.3; from 3.0.0 before 3.4.3 — fixed in 1.44.7, 2.15.3, 3.4.3

How to fix

Upgrade to a fixed version: Drupal 9.3.22, 9.4.7; twigphp Twig 1.44.7, 2.15.3, 3.4.3. Check the vendor advisory for mitigations.

References

• https://github.com/twigphp/Twig/commit/35f3035c5deb0041da7b84daf02dea074ddc7a0b
• https://github.com/twigphp/Twig/security/advisories/GHSA-52m2-vc4m-jj33
• https://lists.debian.org/debian-lts-announce/2022/10/msg00016.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2OKRUHPVLIQVFPPJ2UWC3WV3WQO763NR/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AUVTXMNPSZAHS3DWZEM56V5W4NPVR6L7/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NWRFPZSR74SYVJKBTKTMYUK36IJ3SQJP/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TW53TFJ6WWNXMUHOFACKATJTS7NIHVQE/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WV5TNNJLGG536TJH6DLCIAAZZIPV2GUD/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YU4ZYX62H2NUAKKGUES4RZIM4KMTKZ7F/
• https://www.debian.org/security/2022/dsa-5248
• https://www.drupal.org/sa-core-2022-016
• https://github.com/twigphp/Twig/commit/35f3035c5deb0041da7b84daf02dea074ddc7a0b

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