Vulnerability Intelligence Report
JetBrains TeamCity Deserialization of Untrusted Data Vulnerability
CVE-2026-63077
In JetBrains TeamCity before 2026.1.3, 2025.11.7 unauthenticated remote code execution was possible via the agent polling protocol
CISA KEV
Nuclei Template
SSVC: Active Exploitation
Automatable
Deserialization
CVSS Base Score
9.8
CRITICAL
Exploitability:3.9
Impact Score:5.9
EPSS Probability:86.52%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-502 ↗CWE-502
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| JetBrains | TeamCity | 0 < 2026.1.3, 2025.11.7 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
CISA KEV
ACTIVE IN CATALOG
Nuclei Template
SCANNER AVAILABLE
EPSS Score
86.518%
GitHub Advisory
Vulnerability Class
Deserialization
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | JetBrains s.r.o. · Vendor · Czech Republic |
| Reserved | 2026-07-15T15:12:38 |
| Published | 2026-07-27T16:44:32 |
| Last Updated | 2026-09-23T03:55:33 |
Community Chatter & Buzz