CVE-2022-39261 is a high-severity (CVSS 7.5) Path Traversal vulnerability in twig/twig. A fix is available for twig/twig — see the affected versions and patch details below.
Twig may load a template outside a configured directory when using the filesystem loader
Exploitation Status
No confirmed exploitation observed yet
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2022-39261.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
twig/twig🐘twig/twig🐘twig/twigReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.
Description
Description
When using the filesystem loader to load 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).
Resolution
We fixed validation for such template names.
Even if the 1.x branch is not maintained anymore, a new version has been released.
Credits
We would like to thank Dariusz Tytko for reporting the issue and Fabien Potencier for fixing the issue.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | twig/twig | ≥ 1.0.0&&< 1.44.7 | 1.44.7composer require twig/twig:^1.44.7 |
| 🐘Packagist | twig/twig | ≥ 2.0.0&&< 2.15.3 | 2.15.3composer require twig/twig:^2.15.3 |
| 🐘Packagist | twig/twig | ≥ 3.0.0&&< 3.4.3 | 3.4.3composer require twig/twig:^3.4.3 |
Affected Products
debian linuxdebiandrupaldrupalfedorafedoraprojecttwigsymfonyDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for twig/twig, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update twig/twig to 1.44.7 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-39261 is resolved across your whole dependency graph.
Workarounds
Resolve every user-supplied path to its canonical form and reject anything that escapes the intended directory, and run the component under an account that has no read or write access outside the directory it legitimately serves.
Frequently Asked Questions
Is CVE-2022-39261 in your dependencies?
Find it across Packagist, including transitive dependencies.