Attackers Breached JetBrains Cadence via Unpatched TeamCity, Extracting AWS Credentials

Sep 5, 2026

JetBrains is urging Cadence users to revoke and rotate all credentials following a security incident last month in which unidentified threat actors exploited a recently disclosed critical vulnerability in TeamCity to breach its own environment.

“Cadence users should immediately revoke or rotate all credentials and secrets that may have been used to run their Cadence executions,” JetBrains said.

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