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CVE-2026-65907 critical CVSS 9.1

Code Injection in JetBrains TeamCity (CVE-2026-65907)

Summary

Code injection in JetBrains TeamCity (CVE-2026-65907). Successful exploitation can lead to full system takeover.

Original description

The description as published by the source.

In JetBrains TeamCity before 2026.1.2, 2025.11.6 code execution in Git VCS roots was possible

Source: GitHub Security Advisories (Global) NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A weakness called CVE-2026-65907 was discovered in JetBrains TeamCity.
In plain terms, it is a flaw where attacker-supplied code gets executed by the program.
Severity is Critical (CVSS 9.1/10). If exploited, attackers can fully take over the affected system.
What you should do: update the affected software to the latest version. If unsure, ask your IT team or search the vendor's site for "JetBrains TeamCity CVE-2026-65907".

CVE-2026-65907 (JetBrains TeamCity). Severity: Critical / CVSSv3 9.1. Category: CWE-94.
Response plan:

  1. Check the vendor advisory for affected versions and the patched release.
  2. If a vulnerable version is running in production, schedule maintenance (urgency from KEV/CVSS).
  3. If no patch yet, mitigate via WAF rule, disabling the affected feature, etc.
  4. Monitor logs / SIEM for known IOC and PoC signatures of this CVE.
    PoCs and fix commits: see the 'References' section, MITRE, and NVD.
❓ What is the problem

A weakness (CVE-2026-65907) in JetBrains TeamCity. In plain words, it is a flaw where attacker-supplied code gets executed by the program.

📍 Affected scope

Target versions of JetBrains TeamCity (see vendor advisory). If running in production, identify exposure immediately.

🔥 Severity

Severity: Critical (CVSS 9.1/10). If exploited, attackers can fully take over the affected system.

🔧 How to fix

Update to the patched release as listed in the vendor advisory. (Typical mitigation pattern for CWE-94)

🛡️ Workaround

If a patch is not yet available, consider disabling the affected feature, applying WAF rules, blocking via network ACLs, or isolating the vulnerable version.

🔍 Detection

Check version information, scan dependencies via SBOM, and monitor SIEM for IOC and PoC signatures related to this CVE.

References

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