CVE-2026-84648: Vulnerability in Jenkins Project Jenkins
Description
In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, the system log viewer does not escape log record metadata (source, level, and timestamp) resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers in control of agent processes.
CVSS v3.1
Score 8.8high
Affected software
Jenkins Project
Jenkins
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-84648 is a stored cross-site scripting vulnerability affecting Jenkins 2.579 and earlier, including LTS 2.568.2 and earlier. The vulnerability arises from improper escaping of log record metadata (source, level, and timestamp) in the system log viewer. Attackers who control agent processes can inject malicious scripts that are stored and later executed when viewed in the Jenkins interface, potentially leading to full compromise of confidentiality, integrity, and availability of the Jenkins server.
Potential Impact
Successful exploitation allows an attacker with control over agent processes to execute arbitrary scripts in the Jenkins web interface. This can lead to complete compromise of the Jenkins server, including unauthorized access, data manipulation, and disruption of service. The CVSS score of 8.8 reflects high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided at this time. Until a fix is available, restrict access to agent processes and limit who can control them to reduce the risk of exploitation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- jenkins
- Date Reserved
- 2026-09-01T21:55:27.033Z
- State
- PUBLISHED
Threat ID: 6a984662acd9273b496cc3c2
Added to database: 09/02/2026, 15:53:06 UTC
Last enriched: 09/07/2026, 13:37:45 UTC
Last updated: 10/15/2026, 18:48:24 UTC
Views: 60
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