CVE-2026-48924: Jenkins Bitbucket OAuth Plugin does not restrict the redirect URL after login

May 27, 2026 (updated July 1, 2026)

Jenkins Bitbucket OAuth Plugin 0.17 and earlier does not restrict the redirect URL after login.

This allows attackers to perform phishing attacks by having users go to a Jenkins URL that will forward them to a different site after successful authentication.

Bitbucket OAuth Plugin 0.18 only redirects to relative (Jenkins) URLs.

References

github.com/advisories/GHSA-r8fj-rff6-f7h5
nvd.nist.gov/vuln/detail/CVE-2026-48924
www.jenkins.io/security/advisory/2026-05-27/

Code Behaviors & Features

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