CVE-2026-63077
CRITICAL9.8Insecure deserializationCISA KEVPublic PoCNewsHigh EPSS
Description
In JetBrains TeamCity before 2026.1.3, 2025.11.7 unauthenticated remote code execution was possible via the agent polling protocol
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected products
- JetBrains / TeamCity0 – 2026.1.3, 2025.11.7
- JetBrains / TeamCity2025.11.7
Exploits & proofs of concept
- nucleiJetBrains TeamCity < 2026.1.3, 2025.11.7 - Remote Code Executionby 0x_Akoko,pdteam
News coverage
- CISA Flags TeamCity CVE-2026-63077 RCE Flaw Under Active Exploitation in the WildThe Hacker News · 22d ago
- Critical TeamCity Flaw Could Let Attackers Run OS Commands Without Logging InThe Hacker News · 7/28/2026
References
Updated 24m ago · 8 sources