Back Gbhackers

Critical Jenkins Flaw Exposes Build Environments to XSS Attacks

Gbhackers •Eswar • February 20, 2026

GBHackers on Security is a top cybersecurity news platform, delivering up-to-date coverage on breaches, emerging threats, malware, vulnerabilities, and global cyber incidents.

The full story

This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Critical Jenkins Vulnerability Exposes Build Environments to XSS Attacks A critical stored Cross-Site Scripting (XSS) vulnerability has been identified in Jenkins Core, affecting build environments. The vulnerabilities, tracked as CVE-2026-27099 and CVE-2026-27100, were disclosed by the European Commission under the Jenkins Bug Bounty Program. CVE-2026-27099 is classified as high-severity and poses significant security risks to users. 2 sources 47

Critical Jenkins Flaw Exposes Build Environments to XSS Attacks

The full story

Extracted Entities

Platforms (1)

Vulnerabilities (1)