Critical Jenkins vulnerability CVE-2026-70426 lets attackers bypass the JEP-200 filter and run code on the controller. Patch now. #Jenkins #CVE202670426 #RCE #DevSecOps #Deserialization #CyberSecurity
CVE-2026-70426: Critical Jenkins RCE Flaw Bypasses Deserialization Filter
TL;DR Jenkins patched a critical Jenkins vulnerability, CVE-2026-70426, that bypasses the JEP-200 deserialization filter. Attackers with Agent/Connect permission can run code on the controller. The August 5, 2026 advisory also fixes 22 other flaws. Why This Jenkins Vulnerability Matters The Jenkins controller is the brain of most CI/CD pipelines. Consequently, code execution there exposes source code, build secrets, and deployment credentials.
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