{"id":"CVE-2026-49826","summary":"Concourse login flow has an open redirect issue","details":"Concourse is a container-based automation system written in Go. Prior to version 8.2.3, an attacker is able to craft and send a user a URL that will redirect the user from the Concourse web server to any other site. This could be used in a phishing attack to steal user's credentials. This has been fixed in 8.2.3. No known workarounds are available.","aliases":["BIT-concourse-2026-49826","GHSA-8w27-c4vc-88q9","GO-2026-5866"],"modified":"2026-08-19T09:55:28.952979039Z","published":"2026-08-14T16:25:56.406Z","related":["openSUSE-SU-2026:21483-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49826.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-601"]},"references":[{"type":"WEB","url":"https://github.com/concourse/concourse/releases/tag/v8.2.3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49826.json"},{"type":"ADVISORY","url":"https://github.com/concourse/concourse/security/advisories/GHSA-8w27-c4vc-88q9"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49826"},{"type":"FIX","url":"https://github.com/concourse/concourse/commit/ac60be5f0435b6592f5a4fcc089050d72ad2452c"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/concourse/concourse","events":[{"introduced":"0"},{"fixed":"ac60be5f0435b6592f5a4fcc089050d72ad2452c"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"8.2.3"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v8.2.2","v8.2.1","v8.2.0","v8.1.1","v8.1.0","v8.0.2","v8.0.1","v8.0.0","v7.13.2","v7.13.1","v7.13.0","v7.12.1","v7.12.0","v7.11.2","v7.11.1","v7.11.0","v7.10.0","v7.9.1","v7.9.0","v7.8.1","v7.8.0","v7.7.0","v7.6.0","v7.5.0","v7.4.0","v7.3.2","v7.3.1","v7.3.0","v7.2.0","v7.1.0","v7.0.0","v6.6.0","v6.5.1","v6.5.0","v6.4.0","v6.3.0","v6.2.0","v6.0.0","v5.8.0","v6.0.0-rc.10","v5.7.0","v5.6.0","v5.5.0","v5.4.0","v5.3.0","v5.3.0-rc.9","v5.3.0-rc.8","v5.2.0-rc.24","v5.2.0","v5.1.0","v5.0.0","v5.0.0-rc.90","v4.2.2-rc.133","v4.2.1","v4.2.0","v4.1.0","v4.0.0","v3.14.1","v3.14.0","v3.13.0","v3.12.0","v3.11.0","v3.10.0","v3.9.2","v3.9.1","v3.9.0","v3.8.0","v3.7.0","v3.6.0","v3.5.0","v3.4.0","v3.3.2","v3.3.1","v3.3.0","v3.2.1","v3.2.0","v3.1.1","v3.1.0","v3.0.1","v3.0.0","v2.7.0","v2.6.0","v2.5.0","v2.3.1","v2.3.0","v2.2.0","v2.1.0","v2.0.0","v1.5.1","v1.3.1","v1.2.0","v1.1.0","v0.66.1","v0.66.0","v0.65.0","v0.64.1","v0.64.0","v0.62.1","v0.62.0","v0.61.0","v0.60.1","v0.60.0","v0.59.0","v0.58.0","v0.57.0","v0.56.0","v0.53.0","v0.55.0","v0.54.0","v0.43.0","v0.28.0","v0.7.0","v0.7.0-rc.37","v0.7.0-rc.36","v0.7.0-rc.35","v0.7.0-rc.34","v0.7.0-rc.33","v0.7.0-rc.32","v0.7.0-rc.31","v0.7.0-rc.30","v0.7.0-rc.29","v0.7.0-rc.27","v0.7.0-rc.26","v0.7.0-rc.25","v0.7.0-rc.24","v0.7.0-rc.23","v0.7.0-rc.22","v0.7.0-rc.21","v0.7.0-rc.20","v0.7.0-rc.19","v0.7.0-rc.18","v0.7.0-rc.17","v0.7.0-rc.16","v0.7.0-rc.15","v0.7.0-rc.14","v0.7.0-rc.13","v0.7.0-rc.11","v0.7.0-rc.10","v0.7.0-rc.9","v0.7.0-rc.8","v0.7.0-rc.7","v0.7.0-rc.6","v0.7.0-rc.5","v0.7.0-rc.4","v0.7.0-rc.3","v0.7.0-rc.2","v0.7.0-rc.1","v0.6.0","v0.6.0-rc.42","v0.6.0-rc.41","v0.6.0-rc.40","v0.6.0-rc.39","v0.6.0-rc.38","v0.6.0-rc.37","v0.6.0-rc.36","v0.6.0-rc.35","v0.6.0-rc.33","v0.6.0-rc.32","v0.6.0-rc.31","v0.6.0-rc.30","v0.6.0-rc.29","v0.6.0-rc.28","v0.6.0-rc.27","v0.6.0-rc.26","v0.6.0-rc.25","v0.6.0-rc.24","v0.6.0-rc.23","v0.6.0-rc.22","v0.6.0-rc.20","v0.6.0-rc.19","v0.6.0-rc.18","v0.6.0-rc.17","v0.6.0-rc.15","v0.6.0-rc.14","v0.6.0-rc.13","v0.6.0-rc.12","v0.6.0-rc.11","v0.6.0-rc.10","v0.6.0-rc.9","v0.6.0-rc.2","v0.6.0-rc.1","v0.5.0","v0.5.0-rc.20","v0.5.0-rc.18","v0.5.0-rc.17","v0.5.0-rc.16","v0.5.0-rc.15","v0.5.0-rc.9","v0.5.0-rc.8","v0.5.0-rc.7","v0.5.0-rc.6","v0.4.0","v0.5.0-rc.5","v0.5.0-rc.4","v0.5.0-rc.3","v0.5.0-rc.2","v0.5.0-rc.1","v0.4.0-rc.1","v0.3.0-rc.33","v0.3.0","v0.3.0-rc.32","v0.3.0-rc.31","v0.3.0-rc.25","v0.3.0-rc.24","v0.3.0-rc.23","v0.3.0-rc.20","v0.3.0-rc.8","v0.3.0-rc.7","v0.3.0-rc.6","v0.3.0-rc.5","v0.3.0-rc.4","v0.3.0-rc.3","v0.3.0-rc.2","v0.3.0-rc.1","v0.2.0","v0.2.0-rc.3","v0.2.0-rc.2","v0.2.0-rc.1","v0.1.0","v0.1.0-rc.7","v0.1.0-rc.6","v0.1.0-rc.4"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49826.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N"}]}