# CVE-2024-51755: Unguarded calls to __isset() and to array-accesses when the sandbox is enabled in Twig

> Attackers can bypass security policies to access attributes of Array-like objects in Twig templates when the sandbox is enabled.

- **Severity:** Low 2.2 (`CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 6 Nov 2024
- **Updated:** 7 Nov 2024
- **Also known as:** CLSA-2026-1788348414, DEBIAN-CVE-2024-51755, GHSA-jjxq-ff2g-95vh, UBUNTU-CVE-2024-51755

## What is CVE-2024-51755?

CVE-2024-51755 is a low-severity missing authorization vulnerability in twigphp Twig, published on 6 Nov 2024. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Twig is a template language for PHP. In a sandbox, an 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. This issue has been patched in versions 3.11.2 and 3.14.1. All users are advised to upgrade. There are no known workarounds for this issue.

Weakness: CWE-668 (Exposure of Resource to Wrong Sphere)

## Which versions are affected by CVE-2024-51755?

4 open source packages ship an affected version, including twig/twig.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `twig/twig` | Packagist | All versions | 3.11.2 |
| `twig/twig` | Packagist | All versions | 3.11.2 |
| `twig/twig` | Packagist | From 3.12 | 3.14.1 |
| `twig/twig` | Packagist | From 3.12 | 3.14.1 |

## How do I fix CVE-2024-51755?

Upgrade twig/twig to a fixed version for your release line: 3.11.2 or 3.14.1.

## Is CVE-2024-51755 being exploited?

There is no known exploitation of CVE-2024-51755 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-51755 and fix it if it is affected.

What it is: CVE-2024-51755 is a low-severity missing authorization vulnerability in twigphp Twig, published on 6 Nov 2024. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-51755 in the wild and no public exploit code.

Affected packages and fixed versions:
- twig/twig (Packagist): affected all versions; fixed in 3.11.2
- twig/twig (Packagist): affected all versions; fixed in 3.11.2
- twig/twig (Packagist): affected from 3.12; fixed in 3.14.1
- twig/twig (Packagist): affected from 3.12; fixed in 3.14.1

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2024-51755/ (Markdown: https://insights.sbomify.com/CVE-2024-51755/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-51755
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-51755
- OSV: https://osv.dev/vulnerability/CVE-2024-51755

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-51755/
Summaries are generated and may contain mistakes; the official description above is the record.