Vulnerability · Published Nov 5, 2026 · Assigned by GitHub_M
CVE-2026-54442NationalSecurityAgency/emissary: Incomplete fix for CVE-2026-35571: SSRF
Medium 4.8
In plain English
A medium-severity server-side request forgery in emissary from NationalSecurityAgency. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Maven | gov.nsa.emissary:emissary | 8.51.0 | GHSA-c6q7-wqw2-h65w |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| NationalSecurityAgency | emissary | < 8.51.0 |
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
References
- https://github.com/NationalSecurityAgency/emissary/security/advisories/GHSA-c6q7-wqw2-h65w x_refsource_CONFIRM
- https://github.com/NationalSecurityAgency/emissary/commit/e0179f7558cfb09a5bbc63a2f9fcb50f899768f6 x_refsource_MISC
- https://github.com/NationalSecurityAgency/emissary/releases/tag/8.51.0 x_refsource_MISC