Critical
KEV-listed
CVE-2026-63077
JetBrains Server Compromised via TeamCity Vulnerability CVE-2026-63077
Vendor / product: JetBrains TeamCity On-Premises
Event date: 2026-08-08
Victim organization: JetBrains
Public PoC: Yes
First tracked by RiskWire: 2026-08-28
CISA KEV catalog
Added to KEV
Federal remediation due
2026-08-08 (43 days overdue)
Ransomware campaign use
Unknown
CISA description
JetBrains TeamCity contains a deserialization of untrusted data vulnerability that could allow unauthenticated remote code execution via the agent polling protocol.
Required action
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Sources & citations (1)
- JetBrains told everyone to patch. It didn't patch itself. thenewstack.io · 2026-08-28
References
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