Critical Analysis: CVE-2026-63077 - JetBrains TeamCity Deserialization of Untrusted Data Vulnera... — August 7, 2026
Published 07 Aug 2026 · vulnerability management, CVE analysis, threat intelligence, security operations, cybersecurity news
Initial Discovery and Context Alright, let's talk about CVE-2026-63077, the JetBrains TeamCity deserialization vulnerability that just landed on our plates. Published August 7, 2026, this one is a classic deserialization of untrusted data issue, rated critical, and it’s got all the hallmarks of a nasty RCE vector. TeamCity, for those not deep in the CI/CD trenches, is a widely used continuous integration and continuous delivery server. It's often the brain of an organization’s build and deployment pipeline, meaning it has keys to a hell of a lot of kingdoms – source code repositories, artifact stores, production environments, you name it. A critical RCE on TeamCity is a direct pipeline to an organization's crown jewels. Our initial analysis points to this affecting all TeamCity versions prior to 2026.07. This isn't some niche bug; it's a fundamental architectural flaw t