{"id":"CVE-2026-111927","published":"2026-10-17T19:16:35.527","lastModified":"2026-10-17T19:16:35.527","description":"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.","cvssScore":7.7,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N","cwes":["CWE-522"],"vendors":[],"products":[],"references":[{"url":"https://github.com/coder/coder/security/advisories/GHSA-h58h-qvv5-xvwg","tags":[]},{"url":"https://www.vulncheck.com/advisories/coder-before-2.35.4-credential-theft-via-workspace-proxy-hostname-prefix-match","tags":[]}],"exploitRefs":[{"url":"https://github.com/coder/coder/security/advisories/GHSA-h58h-qvv5-xvwg","tags":[]}],"hasPoc":true,"ai":null}