CVE-2026-35571

MEDIUM

Emissary has Stored XSS via Navigation Template Link Injection

Title source: cna
STIX 2.1

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.

References (2)

Core 2

Scores

CVSS v3 4.8
EPSS 0.0018
EPSS Percentile 7.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (3)
gov.nsa.emissary/emissary 0 - 8.39.0Maven
NationalSecurityAgency/emissary < 8.39.0
nsa/emissary < 8.38.0
Published Apr 07, 2026
Tracked Since Apr 07, 2026