CVE-2026-54442: NationalSecurityAgency/emissary has an incomplete fix for CVE-2026-35571
(updated )
The URL validation regex ^(https?:/)?/.* added to emissary’s NavAction.java allows protocol-relative URLs (//evil.com/...) and single-slash scheme variants (http:/evil.com) to bypass validation, enabling SSRF and open redirect attacks.
References
- github.com/NationalSecurityAgency/emissary/commit/e0179f7558cfb09a5bbc63a2f9fcb50f899768f6
- github.com/NationalSecurityAgency/emissary/commit/e2078417464b9004620dde28dcbca2f73ea06c13
- github.com/NationalSecurityAgency/emissary/releases/tag/8.39.0
- github.com/NationalSecurityAgency/emissary/releases/tag/8.51.0
- github.com/NationalSecurityAgency/emissary/security/advisories/GHSA-c6q7-wqw2-h65w
- github.com/NationalSecurityAgency/emissary/security/advisories/GHSA-cpm7-cfpx-3hvp
- github.com/advisories/GHSA-c6q7-wqw2-h65w
- nvd.nist.gov/vuln/detail/CVE-2026-54442
Code Behaviors & Features
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