{"action":"Upgrade github.com/coder/coder/v2 to 2.29.17 or later.","affected":[{"fixed":"2.34.2","introduced":"2.34.0"},{"fixed":"2.33.8","introduced":"2.33.0"},{"fixed":"2.32.7","introduced":"2.30.0"},{"fixed":"2.29.17","introduced":"0"}],"component":"github.com/coder/coder/v2","cve_ids":["CVE-2026-55430"],"ecosystem":"Go","epss":0.00208,"exploited":false,"fixed_versions":["2.34.2","2.33.8","2.32.7","2.29.17"],"ghsa_id":"GHSA-5g4w-3vw9-478w","id":"tcs_01M5KEY8WZ5VZMD7J8Z9H8GYT1","modified_at":"2026-07-07T20:41:11.336853090Z","published_at":"2026-07-06T21:05:31Z","references":["https://osv.dev/vulnerability/GHSA-5g4w-3vw9-478w","https://github.com/coder/coder/security/advisories/GHSA-5g4w-3vw9-478w","https://github.com/coder/coder/pull/26204","https://github.com/coder/coder"],"severity":{"label":"medium","score":5.8},"sources":[{"source":"osv","source_id":"GHSA-5g4w-3vw9-478w","url":"https://osv.dev/vulnerability/GHSA-5g4w-3vw9-478w"}],"summary":"Coder's subdomain workspace app routing trusts unauthenticated X-Forwarded-Host header, enabling cross-app data access"}