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.
History

Wed, 08 Apr 2026 20:15:00 +0000

Type Values Removed Values Added
First Time appeared Nationalsecurityagency
Nationalsecurityagency emissary
Vendors & Products Nationalsecurityagency
Nationalsecurityagency emissary

Wed, 08 Apr 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 07 Apr 2026 18:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Emissary has Stored XSS via Navigation Template Link Injection
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 4.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-04-08T14:57:05.392Z

Reserved: 2026-04-03T20:09:02.826Z

Link: CVE-2026-35571

cve-icon Vulnrichment

Updated: 2026-04-08T14:57:00.714Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-04-07T16:16:29.920

Modified: 2026-04-08T21:27:00.663

Link: CVE-2026-35571

cve-icon Redhat

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