CVE-2026-33002

High

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.

SeverityHigh

CVSS7.5

Exploit probability—

Product

Jenkins

PublishedMar 18, 2026

First seenMar 18, 2026

Weakness typeCWE-350CWE-350

How to fix

Update

jenkins jenkins2.541.3, 2.555 or later
org.jenkins-ci.main:jenkins-core2.555 or later

Vendor advisories

jenkins.io/security/advisory/2026-03-18/#SECURITY-3674

Affected products

Product	Affected versions	Fixed in
jenkins jenkins	2.426.3 ≤ v < 2.541.3, 2.442 ≤ v < 2.555	2.541.3, 2.555
org.jenkins-ci.main:jenkins-coreMaven	2.442 ≤ v < 2.555	2.555

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