CVE-2026-48920

Jenkins · Email Extension Plugin

A security vulnerability has been identified in the Jenkins Email Extension Plugin, potentially impacting the integrity or security of the CI/CD pipeline.

Executive summary

The Jenkins Email Extension Plugin is subject to a high-severity vulnerability that could compromise the security of the Jenkins automation environment.

Vulnerability

This vulnerability impacts the Email Extension Plugin version 1933; however, specific details regarding the nature of the flaw or authentication requirements are currently limited.

Business impact

With a CVSS score of 8.8, this vulnerability represents a substantial risk to build servers and CI/CD pipelines. Exploitation could allow attackers to gain unauthorized access to Jenkins, potentially leading to supply chain compromises or the exfiltration of sensitive build credentials and source code.

Remediation

Immediate Action: Check the Jenkins security advisory page for the latest plugin updates and upgrade the Email Extension Plugin to the patched version as soon as it is released.

Proactive Monitoring: Monitor Jenkins server logs for unusual email-related activity or unauthorized plugin configuration changes.

Compensating Controls: Restrict plugin access and permissions within the Jenkins dashboard to the minimum necessary for operational requirements to limit potential impact.

Exploitation status

Public Exploit Available: false

Analyst recommendation

Jenkins environments are high-value targets for attackers. Security teams should prioritize updating this plugin immediately upon the release of a patch to prevent lateral movement or unauthorized access to the CI/CD infrastructure.