CVE-2026-35571: Emissary has Stored XSS via Navigation Template Link Injection
(updated )
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.
References
- github.com/NationalSecurityAgency/emissary/commit/e2078417464b9004620dde28dcbca2f73ea06c13
- github.com/NationalSecurityAgency/emissary/pull/1293
- github.com/NationalSecurityAgency/emissary/releases/tag/8.39.0
- github.com/NationalSecurityAgency/emissary/security/advisories/GHSA-cpm7-cfpx-3hvp
- github.com/advisories/GHSA-cpm7-cfpx-3hvp
- nvd.nist.gov/vuln/detail/CVE-2026-35571
Code Behaviors & Features
Detect and mitigate CVE-2026-35571 with GitLab Dependency Scanning
Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →