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JetBrains flags critical TeamCity RCE via auth bypass (CVE-2026-63077)

1 min read
Source: BleepingComputer
JetBrains flags critical TeamCity RCE via auth bypass (CVE-2026-63077)
Photo: BleepingComputer
TL;DR

JetBrains warns that TeamCity On-Premises is vulnerable to a critical authentication bypass vulnerability (CVE-2026-63077) that could enable remote code execution via the agent polling protocol. All On-Prem versions are affected; Cloud customers are protected. Mitigations include upgrading to TeamCity 2025.11.7 or 2026.1.3, or applying the patch plugin for older releases (with restart required for 2017.1–2018.1). TeamCity 2024.03+ auto-downloads patches. Follow best practices to limit exposure (VPN/private networks) since exposing login pages or REST APIs can give attackers entry. No active exploitation reported as of the advisory, but prompt remediation is advised.

Topics:technologysecurity#authentication-bypass#cve-2026-63077#jetbrains#remote-code-execution#security#teamcity
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  1. JetBrains warns of critical TeamCity remote code execution flaw  BleepingComputer
  2. Critical TeamCity Flaw Could Let Attackers Run OS Commands Without Logging In  The Hacker News
  3. Critical Code Execution Vulnerability Patched in TeamCity  SecurityWeek
  4. TeamCity On-Premises RCE Flaw (CVE-2026-63077) Patched  The Cyber Express
  5. JetBrains says a crafted HTTP request could break TeamCity  csoonline.com

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