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JetBrains Cadence Breach: Attackers Exploit Unpatched TeamCity CVE-2026-63077 to ...
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Fusion42 · 6 September 2026 · Fusion42 review
Attackers exploited a critical unpatched remote code execution vulnerability (CVE-2026-63077) in JetBrains TeamCity to breach the JetBrains Cadence cloud service, exfiltrating AWS IAM credentials, source code, and sensitive personal data. The breach highlights risks in CI/CD infrastructure, enabling supply chain attacks, credential theft, and lateral movement within cloud and development environments.
This Wire brief sits within Fusion42's coverage of Enterprise Software, and 2 sources have reported it between 5 Sep 2026 and 6 Sep 2026.
◆ ◆ The Wire takeaway
This breach shows attackers can silently move inside CI/CD systems using unpatched exploits and stolen credentials. You must urgently audit your CI/CD tools, rotate all secrets, and isolate cloud access before this attack route reaches your platform.
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2 sources · first reported 5 Sep 2026 · latest 6 Sep 2026
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