CVE-2026-84649
Published:September 02, 2026
Updated:September 22, 2026
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 Packages
https://github.com/jenkinsci/stapler.git (GITHUB):
Affected version(s) >=2092.v91b_2c63e0c97 <2117.vb_66952503166Fix Suggestion:
Update to version 2117.vb_66952503166org.jenkins-ci.main:jenkins-core (JAVA):
Affected version(s) >=2.447 <2.580Fix Suggestion:
Update to version 2.580org.jenkins-ci.main:jenkins-core (JAVA):
Affected version(s) >=2.452.1 <2.568.3Fix Suggestion:
Update to version 2.568.3org.kohsuke.stapler:stapler (JAVA):
Affected version(s) >=2092.v91b_2c63e0c97 <2117.vb_66952503166Fix Suggestion:
Update to version 2117.vb_66952503166Related Resources (1)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Cross-Site Request Forgery (CSRF)
EPSS
Base Score:
0.17