{"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-2026-55430"],"ecosystem":"Go","epss":0.00208,"exploited":false,"fixed_versions":["2.29.17","2.32.7","2.33.8","2.34.2"],"ghsa_id":"GHSA-5g4w-3vw9-478w","id":"tcs_01M5KGQQM9RVQV2MZ7353JCDWS","modified_at":"2026-07-07T20:30:17.637359700Z","published_at":"2026-07-07T16:41:46Z","references":["https://osv.dev/vulnerability/GO-2026-5917","https://github.com/coder/coder/security/advisories/GHSA-5g4w-3vw9-478w","https://github.com/coder/coder/pull/26204"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"GO-2026-5917#Go/github.com/coder/coder/v2","url":"https://osv.dev/vulnerability/GO-2026-5917"}],"summary":"Coder's subdomain workspace app routing trusts unauthenticated X-Forwarded-Host header, enabling cross-app data access in github.com/coder/coder"}