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Description

Jenkins 2.442 through 2.554 (both inclusive), LTS 2.426.3 through LTS 2.541.2 (both inclusive) performs origin validation of requests made through the CLI WebSocket endpoint by computing the expected origin for comparison using the Host or X-Forwarded-Host HTTP request headers, making it vulnerable to DNS rebinding attacks that allow bypassing origin validation.

PUBLISHED Reserved 2026-03-17 | Published 2026-03-18 | Updated 2026-03-19 | Assigner jenkins

Product status

Default status
affected

Any version before 2.426.3
unaffected

2.427 (maven) before 2.442
unaffected

2.555 (maven) before *
unaffected

2.541.3 (maven) before 2.541.*
unaffected

References

www.jenkins.io/security/advisory/2026-03-18/ (Jenkins Security Advisory 2026-03-18) vendor-advisory

cve.org (CVE-2026-33002)

nvd.nist.gov (CVE-2026-33002)

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