CVE-2026-35571
Emissary has Stored XSS via Navigation Template Link Injection
CVSS Score
4.8
EPSS Score
0.0%
EPSS Percentile
7th
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.
| CWE | CWE-79 |
| Vendor | nationalsecurityagency |
| Product | emissary |
| Published | Apr 7, 2026 |
| Last Updated | Apr 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
NationalSecurityAgency / emissary
< 8.39.0