{"id":"CVE-2026-49826","aliases":["BIT-concourse-2026-49826","GHSA-8w27-c4vc-88q9","GO-2026-5866"],"url":"https://o3.security/vulnerability/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.","published":"2026-08-14T16:25:56.406Z","modified":"2026-08-19T09:55:28.952979039Z","cvss":null,"epss":{"score":0.00299,"percentile":0.22182,"asOf":"2026-09-07"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/concourse/concourse","fixedVersion":"1.6.1-0.20260526150512-ac60be5f0435"}],"fix":{"url":"https://github.com/concourse/concourse/commit/ac60be5f0435b6592f5a4fcc089050d72ad2452c","label":"concourse/concourse@ac60be5"},"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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-19T09:55:28.952979039Z"}}