CVE-2026-63077: CWE-502 in JetBrains TeamCity
In JetBrains TeamCity before 2026.1.3, 2025.11.7 unauthenticated remote code execution was possible via the agent polling protocol
AI Analysis
Technical Summary
CVE-2026-63077 is a critical vulnerability in JetBrains TeamCity that allows unauthenticated remote code execution due to a CWE-502 deserialization flaw. The vulnerability affects versions prior to 2026.1.3 and 2025.11.7. The CVSS 3.1 base score is 9.8, reflecting the ease of exploitation and the potential for full system compromise. No official remediation or patch has been published by JetBrains as of the provided data. The vulnerability is publicly known and published but not yet confirmed to be exploited in the wild.
Potential Impact
Successful exploitation of this vulnerability allows an unauthenticated attacker to execute arbitrary code remotely on the affected TeamCity server. This can lead to full system compromise, data theft, or disruption of services. Given the critical CVSS score and the lack of required privileges or user interaction, the impact is severe.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict access to TeamCity instances from untrusted networks and monitor for suspicious activity. Avoid exposing TeamCity servers directly to the internet.
CVE-2026-63077: CWE-502 in JetBrains TeamCity
Description
In JetBrains TeamCity before 2026.1.3, 2025.11.7 unauthenticated remote code execution was possible via the agent polling protocol
CVSS v3.1
Score 9.8critical
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-63077 is a critical vulnerability in JetBrains TeamCity that allows unauthenticated remote code execution due to a CWE-502 deserialization flaw. The vulnerability affects versions prior to 2026.1.3 and 2025.11.7. The CVSS 3.1 base score is 9.8, reflecting the ease of exploitation and the potential for full system compromise. No official remediation or patch has been published by JetBrains as of the provided data. The vulnerability is publicly known and published but not yet confirmed to be exploited in the wild.
Potential Impact
Successful exploitation of this vulnerability allows an unauthenticated attacker to execute arbitrary code remotely on the affected TeamCity server. This can lead to full system compromise, data theft, or disruption of services. Given the critical CVSS score and the lack of required privileges or user interaction, the impact is severe.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict access to TeamCity instances from untrusted networks and monitor for suspicious activity. Avoid exposing TeamCity servers directly to the internet.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- JetBrains
- Date Reserved
- 2026-07-15T15:12:38.892Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a67906e9c2644c7f885e443
Added to database: 07/27/2026, 17:07:58 UTC
Last enriched: 08/06/2026, 06:41:19 UTC
Last updated: 09/10/2026, 19:36:55 UTC
Views: 96
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