CVE-2026-54442
NationalSecurityAgency/emissary: Incomplete fix for CVE-2026-35571: SSRF
Emissary is a P2P based data-driven workflow engine. Prior to 8.51.0, the VALID_LINK validation in src/main/java/emissary/server/mvc/NavAction.java accepts protocol-relative URLs when processing configured navigation links. Browser URL normalization can interpret these accepted strings as external origins. The authoritative advisory attributes open redirect, server-side request forgery, and cloud metadata access to this bypass, but it identifies neither the server-side dereference path nor how navigation-link processing reaches that path. This issue is fixed in version 8.51.0.
Fixes and workarounds
Fix
gov.nsa.emissary:emissary (Maven): OSV reports a fixed version 8.51.0. Check the advisory for supported release branches.
Source: OSV GHSA-c6q7-wqw2-h65wAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| emissary NationalSecurityAgency |
< 8.51.0 (affected) | CNA: GitHub_M |
gov.nsa.emissary:emissarygov.nsa.emissary:emissary
Maven |
8.0.0 (affected, Maven) 8.1.0 (affected, Maven) 8.10.0 (affected, Maven) 8.11.0 (affected, Maven) 8.11.1 (affected, Maven) 8.12.0 (affected, Maven) 8.13.0 (affected, Maven) 8.14.0 (affected, Maven) 8.15.0 (affected, Maven) 8.16.0 (affected, Maven) 8.17.0 (affected, Maven) 8.18.0 (affected, Maven) 8.19.0 (affected, Maven) 8.19.1 (affected, Maven) 8.2.0 (affected, Maven) 8.20.0 (affected, Maven) 8.21.0 (affected, Maven) 8.22.0 (affected, Maven) 8.23.0 (affected, Maven) 8.24.0 (affected, Maven) 8.25.0 (affected, Maven) 8.26.0 (affected, Maven) 8.27.0 (affected, Maven) 8.28.0 (affected, Maven) 8.29.0 (affected, Maven) 8.3.0 (affected, Maven) 8.30.0 (affected, Maven) 8.31.0 (affected, Maven) 8.32.0 (affected, Maven) 8.33.0 (affected, Maven) 8.34.0 (affected, Maven) 8.35.0 (affected, Maven) 8.36.0 (affected, Maven) 8.37.0 (affected, Maven) 8.38.0 (affected, Maven) 8.39.0 (affected, Maven) 8.4.0 (affected, Maven) 8.40.0 (affected, Maven) 8.41.0 (affected, Maven) 8.42.0 (affected, Maven) 8.43.0 (affected, Maven) 8.44.0 (affected, Maven) 8.45.0 (affected, Maven) 8.46.0 (affected, Maven) 8.47.0 (affected, Maven) 8.48.0 (affected, Maven) 8.49.0 (affected, Maven) 8.5.0 (affected, Maven) 8.50.0 (affected, Maven) 8.6.0 (affected, Maven) 8.7.0 (affected, Maven) 8.7.1 (affected, Maven) 8.8.0 (affected, Maven) 8.9.0 (affected, Maven) Ecosystem version events: introduced 0; fixed 8.51.0 Source events (ECOSYSTEM)Other versions: unaffected |
OSV GHSA-c6q7-wqw2-h65w |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 4.8 medium |
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N | CNA: GitHub_M |
Exploit evidence
- https://github.com/NationalSecurityAgency/emissary/security/advisories/GHSA-c6q7-wqw2-h65w
exploit · ADP: CISA-ADP
References
- https://github.com/NationalSecurityAgency/emissary/security/advisories/GHSA-c6q7-wqw2-h65wCNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/NationalSecurityAgency/emissary/commit/e0179f7558cfb09a5bbc63a2f9fcb50f899768f6CNA: GitHub_M · x_refsource_MISC
- https://github.com/NationalSecurityAgency/emissary/releases/tag/8.51.0CNA: GitHub_M · x_refsource_MISC
- https://github.com/NationalSecurityAgency/emissary/security/advisories/GHSA-c6q7-wqw2-h65wADP: CISA-ADP · exploit
- https://github.com/advisories/GHSA-c6q7-wqw2-h65wOSV / GitHub Security Advisories · advisory
- https://osv.dev/vulnerability/GHSA-c6q7-wqw2-h65wOSV / GitHub Security Advisories · osv
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