# CVE-2019-10769: Sandbox Breakout / Arbitrary Code Execution in safer-eval

> Attackers can execute arbitrary code by triggering a RangeError in the safer-eval sandbox, compromising applications using this Node.js library.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Dec 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-v63x-xc9j-hhvq

## What is CVE-2019-10769?

CVE-2019-10769 is a critical code injection vulnerability in safer-eval, published on 6 Dec 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

safer-eval is a npm package to sandbox the he evaluation of code used within the eval function. Affected versions of this package are vulnerable to Arbitrary Code Execution via generating a RangeError.

Weakness: CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2019-10769?

2 open source packages ship an affected version, including safer-eval. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `safer-eval` | npm | All versions to 1.3.6 | None |
| `safer-eval` | npm | All versions to 1.3.6 | None |

Products: Safer-Eval Project Safer-Eval.

## How do I fix CVE-2019-10769?

No fix has been published for CVE-2019-10769 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-10769 being exploited?

There is no known exploitation of CVE-2019-10769 in the wild and no public exploit code.

## Other vulnerabilities in safer-eval

- [CVE-2019-10759](https://insights.sbomify.com/CVE-2019-10759/): Sandbox Breakout / Arbitrary Code Execution in safer-eval (critical 9.9)
- [CVE-2019-10760](https://insights.sbomify.com/CVE-2019-10760/): Sandbox Breakout / Arbitrary Code Execution in safer-eval (critical 9.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-10769 and fix it if it is affected.

What it is: CVE-2019-10769 is a critical code injection vulnerability in safer-eval, published on 6 Dec 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-10769 in the wild and no public exploit code.

Affected packages and fixed versions:
- safer-eval (npm): affected all versions up to 1.3.6; no fix listed
- safer-eval (npm): affected all versions up to 1.3.6; no fix listed

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-2019-10769/ (Markdown: https://insights.sbomify.com/CVE-2019-10769/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-10769
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-10769
- OSV: https://osv.dev/vulnerability/CVE-2019-10769

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-10769/
Summaries are generated and may contain mistakes; the official description above is the record.