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.

Project Subscriptions

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-cpm7-cfpx-3hvp Emissary has Stored XSS via Navigation Template Link Injection
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

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'}


Projects

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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

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cve-icon OpenCVE Enrichment

No data.

Weaknesses