{"action":"Upgrade github.com/coder/coder/v2 to 2.29.17 or later.","affected":[{"fixed":"2.29.17","introduced":"0"},{"fixed":"2.32.7","introduced":"2.30.0"},{"fixed":"2.33.8","introduced":"2.33.0"},{"fixed":"2.34.2","introduced":"2.34.0"}],"component":"github.com/coder/coder/v2","cve_ids":["CVE-2026-55438"],"ecosystem":"Go","epss":0.00222,"exploited":false,"fixed_versions":["2.29.17","2.32.7","2.33.8","2.34.2"],"ghsa_id":"GHSA-5wg6-jmq2-53pw","id":"tcs_01M5KGQQY01RT35RCY32TSZ4A3","modified_at":"2026-07-07T20:30:16.373554927Z","published_at":"2026-07-07T16:41:46Z","references":["https://osv.dev/vulnerability/GO-2026-5918","https://github.com/coder/coder/security/advisories/GHSA-5wg6-jmq2-53pw","https://github.com/coder/coder/pull/26085","https://github.com/coder/coder/pull/26086"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"GO-2026-5918#Go/github.com/coder/coder/v2","url":"https://osv.dev/vulnerability/GO-2026-5918"}],"summary":"Coder's workspace app CORS origin check can be bypassed via UUID-based subdomain spoofing in github.com/coder/coder"}