CVE-2026-63077

Analyzed
Published: 27 Jul 2026, 16:44
Last modified:06 Aug 2026, 03:55

Vulnerability Summary

Overall Risk (default)
high
70/100
CVSS Score
9.8 CRITICAL
v3.1 (cve.org)
EPSS Score
10.72% MEDIUM
11% probability 0.00%
KEV
Listed
CISA
1 listing
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

27 Jul 2026, 16:44
Published
Vulnerability first disclosed
05 Aug 2026, 00:00
Added to CISA KEV
JetBrains TeamCity Deserialization of Untrusted Data Vulnerability
06 Aug 2026, 03:55
Last Modified
Vulnerability information updated
08 Aug 2026, 00:00
CISA Remediation Due
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.

Description

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

CVSS Metrics

  • v3.1•CRITICAL•Score: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 10.72%• Percentile: 95%

Techniques & Countermeasures

  • CWE-502•Deserialization of Untrusted Data

    The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Affected Systems

  • jetbrains•teamcity

    < 2026.1.3, 2025.11.7 | < 2025.11.7 | ≥ 2026.1, < 2026.1.3

References (2)