CVE-2026-63077

JetBrains TeamCity

Published 27 Jul 2026 · updated 6 Aug 2026 · Analyzed

9.8 Critical · CVSS 3.1, jetbrains.com

Exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on 5 Aug 2026, with a remediation deadline of 8 Aug 2026 for US federal agencies. It has been used in ransomware campaigns.

Required action: 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

References