PatchSiren cyber security CVE debrief

CVE-2026-70440 Jenkins Project CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-05T18:17:13.813Z and has not been modified since then. The Jenkins Qualys Container Scanning Connector Plugin 1.8.0.5 and earlier does not escape user-controlled field values in a JavaScript context, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Item/Configure permission. This vulnerability allows attackers to inject malicious scripts and potentially steal sensitive information or take control of the Jenkins instance. The debrief is based on limited evidence; verify vulnerability details through official records and vendor remediation. Check for affected Jenkins instances using the Qualys Container Scanning Connector Plugin and validate user-controlled field values in JavaScript contexts. Ensure Item/Configure permission restrictions are in place and monitor for suspicious activity.

Vendor: Jenkins Project
Product: Jenkins Qualys Container Scanning Connector Plugin
CVSS: MEDIUM 5.4
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-08-05
Original CVE updated: 2026-08-05
Advisory published: 2026-08-05
Advisory updated: 2026-08-05

Who should care

Administrators of Jenkins instances using the Qualys Container Scanning Connector Plugin, security teams monitoring for XSS vulnerabilities, and developers responsible for maintaining the plugin should be aware of this vulnerability. They should take immediate action to inventory affected systems, apply vendor patches, and implement compensating controls to prevent exploitation.

Technical summary

The Jenkins Qualys Container Scanning Connector Plugin 1.8.0.5 and earlier does not escape user-controlled field values in a JavaScript context, resulting in a stored cross-site scripting (XSS) vulnerability. This vulnerability is exploitable by attackers with Item/Configure permission, allowing them to inject malicious scripts and potentially steal sensitive information or take control of the Jenkins instance.

Defensive priority

Medium-severity XSS vulnerability in Jenkins Qualys Container Scanning Connector Plugin requires immediate attention.

Recommended defensive actions

Inventory affected Jenkins instances using Qualys Container Scanning Connector Plugin and apply vendor patches
Implement compensating controls, such as web application firewalls, to protect against XSS attacks
Monitor for suspicious activity and exception tracking related to the Qualys Container Scanning Connector Plugin
Review and restrict Item/Configure permissions for users who could exploit the vulnerability
Conduct a thorough review of Jenkins instance configurations and Qualys Container Scanning Connector Plugin settings
Verify that user-controlled field values are properly escaped in JavaScript contexts
Track and document remediation efforts and testing results for CVE-2026-70440

Evidence notes

The evidence for CVE-2026-70440 is limited; verify vulnerability details through official records and vendor remediation. Check for affected Jenkins instances using the Qualys Container Scanning Connector Plugin and validate user-controlled field values in JavaScript contexts. Ensure Item/Configure permission restrictions are in place and monitor for suspicious activity.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-05T18:17:13.813Z and has not been modified since then.