CVE-2026-49981: Twig: Sandbox filter, tag and function allow-list bypass when sandbox state changes between renders for a cached `Template`

high Affects twig/twig. Feed 2026.10.29.1, updated 2026-10-28; published 2026-07-01; advisory modified 2026-09-10.

Twig: Sandbox filter, tag and function allow-list bypass when sandbox state changes between renders for a cached `Template`

Package: twig/twig Composer
Affected versions: <3.27.0
Fixed in: 3.27.0
Severity: high
Exploitation: not on CISA KEV · EPSS 0% (29.9th percentile)
Published: 2026-07-01
Source: osv.dev

References

Am I affected?

Find out in one command. phpwarden checks your composer.lock against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# one-time install
pip install phpwarden

# then
phpwarden deps composer.lock

Or keep it checked automatically: GitHub Action · pre-commit hook · GitLab CI · Laravel artisan command

Install docs How findings are ranked

Related advisories

CVE-2022-23614 high Code injection in Twig same package: twig/twig
CVE-2015-7809 high Twig remote code execution in templates same package: twig/twig
CVE-2022-39261 high Twig may load a template outside a configured directory when using the filesystem loader same package: twig/twig
CVE-2019-9942 low Twig Sandbox Information Disclosure same package: twig/twig
CVE-2024-45411 high Twig has a possible sandbox bypass same package: twig/twig
CVE-2026-24425 high Twig: Possible sandbox bypass when using a source policy same package: twig/twig