CVE-2026-49826: Concourse login flow has an open redirect issue

July 1, 2026

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.

References

github.com/advisories/GHSA-8w27-c4vc-88q9
github.com/concourse/concourse/commit/ac60be5f0435b6592f5a4fcc089050d72ad2452c
github.com/concourse/concourse/releases/tag/v8.2.3
github.com/concourse/concourse/security/advisories/GHSA-8w27-c4vc-88q9
nvd.nist.gov/vuln/detail/CVE-2026-49826

Code Behaviors & Features

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