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

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: 2026-04-07T15:26:30.391Z

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

Link: CVE-2026-35571

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

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

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

Link: CVE-2026-35571

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.