HIGH 8.7 NVD
CVE-2026-111927
Coder before 2.29.20, 2.33.0 before 2.33.12, 2.34.0 before 2.34.8, and 2.35.0 before 2.35.4 contains an improper hostname validation flaw in GetWorkspaceProxyBy
Coder before 2.29.20, 2.33.0 before 2.33.12, 2.34.0 before 2.34.8, and 2.35.0 before 2.35.4 contains an improper hostname validation flaw in GetWorkspaceProxyByHostname whose SIMILAR TO pattern performs a prefix match, so any domain that is a string prefix of a workspace-proxy access URL is trusted as a proxy. Attackers owning such a domain can lure an authenticated victim to a crafted /api/v2/applications/auth-redirect link, capture the redirected application_connect API key, and replay it to access the victim's workspace apps.
References
- https://github.com/coder/coder/security/advisories/GHSA-h58h-qvv5-xvwg
- https://www.vulncheck.com/advisories/coder-before-2.35.4-credential-theft-via-workspace-pr
This high severity vulnerability with a CVSS score of 8.7 was published on 2026-10-17 via NVD.
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