CVE-2026-84649 — Jenkins Project / Jenkins

Description (CNA)

In Stapler 1839.ved17667b_a_eb_5 through 2107.v8dfcb_e8ed317 (both inclusive), except 2088.2093.vd7c3e58008a_6, included in Jenkins 2.447 through 2.579 (both inclusive), LTS 2.452.1 through 2.568.2 (both inclusive), an HTTP endpoint serving dynamically generated JavaScript resources embeds the user's cross-site request forgery (CSRF) token (crumb) as a string literal, allowing attackers with control over a page hosted on the same site as Jenkins to obtain a valid crumb for the targeted user's session and perform actions on their behalf.

Affected (CNA)

Vendor / product	Versions
Jenkins Project / Jenkins	unaffected 2.580 before ; unaffected 0 before 2.447; unaffected 2.568.3 before 2.568.

CWE

No CWE identifiers supplied.

References

https://www.jenkins.io/security/advisory/2026-09-02/#SECURITY-3878

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.