CVE-2026-63077

Critical9.8Published on July 27, 2026

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

Actively exploited

  • In the CISA exploited-vulnerabilities catalogue since Aug 5, 2026
  • US federal agencies must remediate it by Aug 8, 2026 (BOD 22-01)
  • First attack observed 8 days after disclosure

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.

Source: CISA KEV · Sep 8, 2026 Aug 24, 2026 Aug 5, 2026 Aug 5, 2026

CVSS score9.8 / 10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)CWE-502
Vendorsjetbrains

Affected products

VendorsProductVersions
jetbrainsteamcity< 2025.11.7

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