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LOW severity

CVE-2024-51755 — twig

LOWFix: twigphp/Twig@831c148

CVE-2024-51755 is a low-severity (CVSS 2.2) CWE-668 vulnerability in twig/twig. A fix is available for twig/twig — see the affected versions and patch details below.

Unguarded calls to __isset() and to array-accesses when the sandbox is enabled in Twig

Also known asGHSA-jjxq-ff2g-95vh
Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Nov 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • 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-2024-51755.

EPSS Exploitation Probability

via FIRST.org ↗
0.4%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs37th percentile — riskier than 37% of all scored CVEsHighest risk
0.00%0.31%0.62%0.93%0.1%0.4%May 26Sep 26Nov 26

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

2 pkgs affected
🐘twig/twig🐘twig/twig

Real-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

In a sandbox, and attacker can access attributes of Array-like objects as they were not checked by the security policy. They are now checked via the property policy and the __isset() method is now called after the security check. This is a BC break.

Resolution

The sandbox mode now ensures access to array-like's properties is allowed.

The patch for this issue is available here for the 3.11.x branch, and here for the 3.x branch.

Credits

We would like to thank Jamie Schouten for reporting the issue and Nicolas Grekas for providing the fix.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagisttwig/twigall versions3.11.2composer require twig/twig:^3.11.2
🐘Packagisttwig/twig≥ 3.12&&< 3.14.13.14.1composer require twig/twig:^3.14.1

Detection & mitigation playbook

Open-source dependency

  1. Detect

    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.

  2. Fix

    Update twig/twig to 3.11.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2024-51755 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

### Description In a sandbox, and attacker can access attributes of Array-like objects as they were not checked by the security policy. They are now checked via the property policy and the `__isset()` method is now called after the security check. **This is a BC break.** ### Resolution The sandbox mode now ensures access to array-like's properties is allowed. The patch for this issue is available [here](https://github.com/twigphp/Twig/commit/ec39a9dccc5fb4eaaba55e5d79a6f84a8dd8b69d) for the 3.11.x branch, and [here](https://github.com/twigphp/Twig/commit/b957e5a44cc0075d04ccff52f8fa9d8e6db
O3 Security · Impact-Aware SCA

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CVE-2024-51755: twig — Fixed in 3.11.2