by Kastro
Paper/Archive/CVE-2026-63077

CVE-2026-63077

JetBrains TeamCity — JetBrains TeamCity Deserialization of Untrusted Data Vulnerability

KEV · due 8 Augransomware useEPSS 94%public exploitSSVC actCVSS 9.8
critical.is priorityof 100
99
CVSS 9.8 (CNA)9.8 / 10 × 3029.4In CISA KEV+3030.0EPSS percentile 99.8.998 × 2020.0Exploit: SSVC active+1010.0SSVC exploitation: active+1010.0
Description · from the CVE record

In JetBrains TeamCity before 2026.1.3, 2025.11.7 unauthenticated remote code execution was possible via the agent polling protocol

Affected

ProductAffectedFixed inSource
TeamCity< 2026.1.3, 2025.11.72026.1.3, 2025.11.7CNA

Scores by source

JetBrains (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: active · Automatable: yes · Technical impact: total

References

refjetbrains.com/privacy-security/issues-fixedrefcisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-63077kevcisa.gov/known-exploited-vulnerabilities-catalog