CVE-2026-35571

Emissary is a P2P based data-driven workflow engine. Prior to 8.39.0, Mustache navigation templates interpolated configuration-controlled link values directly into href attributes without URL scheme validation. An administrator who could modify the navItems configuration could inject javascript: URIs, enabling stored cross-site scripting (XSS) against other authenticated users viewing the Emissary web interface. This vulnerability is fixed in 8.39.0.

Score

CVSS 3.1 4.8 Medium

Status

Analyzed - security-advisories@github.com

Published

2026-04-07

Last modified

2026-10-26

Weaknesses

CWE-79

Affected products

• Emissary (Nationalsecurityagency)
• Emissary (Nsa)

References

• https://github.com/NationalSecurityAgency/emissary/security/advisories/GHSA-cpm7-cfpx-3hvp
• https://github.com/NationalSecurityAgency/emissary/pull/1293