vulnerability
Jenkins Advisory 2026-03-18: CVE-2026-33002: DNS rebinding vulnerability in WebSocket CLI origin validation
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 8 | (AV:N/AC:H/Au:N/C:C/I:C/A:C) | Mar 19, 2026 | Mar 19, 2026 | Mar 27, 2026 |
Severity
8
CVSS
(AV:N/AC:H/Au:N/C:C/I:C/A:C)
Published
Mar 19, 2026
Added
Mar 19, 2026
Modified
Mar 27, 2026
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.
Solutions
jenkins-lts-upgrade-2_541_3jenkins-upgrade-2_555
Rapid7 Labs
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