JetBrains fixes critical unauthenticated RCE in TeamCity On-Premises (CVE-2026-63077)
Overview
JetBrains has addressed a significant security vulnerability (CVE-2026-63077) in its TeamCity On-Premises software that could allow attackers to execute code without authentication. This flaw affects users who host TeamCity servers themselves, making it crucial for administrators to act swiftly. JetBrains is urging these users to upgrade their installations immediately to protect against potential exploitation. For those unable to upgrade right away, the company has provided a security patch plugin as a temporary fix. Given TeamCity's popularity as a continuous integration and delivery tool, the urgency of this update is clear, as unpatched systems could become prime targets for cyberattacks.
Key Takeaways
- Affected Systems: TeamCity On-Premises
- Action Required: Administrators are advised to upgrade their TeamCity On-Premises servers to the latest version.
- Timeline: Newly disclosed
Original Article Summary
JetBrains has fixed a critical vulnerability (CVE-2026-63077) affecting TeamCity On-Premises and is urging admins to upgrade self-hosted servers as soon as possible. “For those who are unable to do so, we have released a security patch plugin,” noted Daniel Gallo, Solutions Engineering Lead at JetBrains. TeamCity as a possible target JetBrains TeamCity is a widely used continuous integration and continuous delivery (CI/CD) server solution. It’s available as a JetBrains-hosted option (TeamCity Cloud) or can be … More → The post JetBrains fixes critical unauthenticated RCE in TeamCity On-Premises (CVE-2026-63077) appeared first on Help Net Security.
Impact
TeamCity On-Premises
Exploitation Status
The exploitation status is currently unknown. Monitor vendor advisories and security bulletins for updates.
Timeline
Newly disclosed
Remediation
Administrators are advised to upgrade their TeamCity On-Premises servers to the latest version. A security patch plugin has also been released for users who cannot upgrade immediately.
Additional Information
This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.
Related Topics: This incident relates to CVE, Vulnerability, Patch, and 3 more.
Multiple Sources: This threat is being reported by 2 different security sources, indicating significant concern within the cybersecurity community.