Deserialization of Untrusted Data in Emissary
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- High
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Low · Low · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-502.
Summary
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| NationalSecurityAgency | emissary | before 6.5.0 | 6.5.0 | Patch available | CNA |
- emissary VendorNationalSecurityAgency Affected before 6.5.0 Fixed in 6.5.0 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:nsa:emissary:6.4.0:*:*:*:*:*:*:* | 6.4.0 | Vulnerable | NationalSecurityAgency |
- cpe:2.3:a:nsa:emissary:6.4.0:*:*:*:*:*:*:* Versions 6.4.0 Vulnerable ·NationalSecurityAgency
Remediation
- Fix · CNA emissary (NationalSecurityAgency) Fixed in 6.5.0
Timeline
- 2026-10-02 Threatist record created from CVE-2021-32634
References
More NationalSecurityAgency Emissary vulnerabilities
- TI-2026-27685 Emissary has an OS Command Injection via Unvalidated IN_FILE_ENDING / OUT_FILE_ENDING in Executrix CVSS 3.1HIGH 8.8
- TI-2021-12315 Post-authentication Remote Code Execution (RCE) in emissary:emissary CVSS 3.1CRITICAL 9.1
- TI-2021-12307 Server-Side Request Forgery (SSRF) in emissary:emissary CVSS 3.1CRITICAL 9.9
- TI-2026-27683 Emissary has GitHub Actions Shell Injection via Workflow Inputs CVSS 3.1CRITICAL 9.1
- TI-2021-12047 U.S. CVSS 3.1HIGH 8.8
- TI-2021-12049 The ConsoleAction component of U.S. CVSS 3.1HIGH 8.8
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences