U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds a JetBrains TeamCity vulnerability to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added a JetBrains TeamCity vulnerability, tracked as CVE-2026-63077 (CVSS score of 9.8), to its Known Exploited Vulnerabilities (KEV) catalog. At the end of July, JetBrains released security updates for TeamCity […]

A newly patched security flaw impacting on-premise versions of JetBrains TeamCity has come under active exploitation in the wild, according to the U.S. Cybersecurity and Infrastructure Security Agency (CISA). The vulnerability in question is CVE-2026-63077 (CVSS score: 9.8), a case of deserialization of untrusted data that could allow an unauthenticated attacker with access to a TeamCity server

CISA has added one new vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog , based on evidence of active exploitation.   CVE-2026-63077 JetBrains TeamCity Deserialization of Untrusted Data Vulnerability This type of vulnerability is a frequent attack vector for malicious cyber actors and poses significant risks to the federal enterprise. Binding Operational Directive (BOD) 26-04: Prioritizing Security Updates Based on Risk establishes vulnerability management requirements for Federal Civilian Executive Branch (FCEB) agencies. BOD 26-04 reinforces the importance of the KEV Catalog and requires federal agencies to prioritize rapid remediation of high-risk vulnerabilities, specifically those identified by Common Vulnerabilities and Exposures (CVEs) listed in CISA’s KEV Catalog on publicly exposed assets that grant total control of the asset post-exploitation, while deferring action for lower-risk vulnerabilities. BOD 26-04 further establishes basic expectations for when agencies must check whether threat actors compromised the system before the patch was applied. While BOD 26-04 applies only to FCEB agencies, CISA encourages all organizations to adopt risk-based vulnerability management and prioritize remediation of KEV Catalog vulnerabilities . CISA will continue to add vulnerabilities to the catalog that meet the specified criteria . Aware of an exploited vulnerability not currently listed in the KEV Catalog? Submit it for potential add...

JetBrains TeamCity contains a deserialization of untrusted data vulnerability that could allow unauthenticated remote code execution via the agent polling protocol.

JetBrains has patched CVE-2026-63077, a critical TeamCity flaw that could let unauthenticated attackers execute server commands and compromise connected CI/CD pipelines. The post Critical TeamCity Flaw Could Let Unauthenticated Attackers Execute Server Commands appeared first on TechRepublic .

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 .

JetBrains is urging customers of on-premise versions of TeamCity to update to the latest version following the discovery of a critical security issue that could result in arbitrary code execution. The vulnerability, assigned CVE-2026-63077 (CVSS score: 9.8), affects all TeamCity On-Premises versions. It has been addressed in versions 2025.11.7 and 2026.1.3. TeamCity Cloud instances have already

CISA has added eight new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog , based on evidence of active exploitation.  CVE-2023-27351 PaperCut NG/MF Improper Authentication Vulnerability CVE-2024-27199 JetBrains TeamCity Relative Path Traversal Vulnerability CVE-2025-2749 Kentico Xperience Path Traversal Vulnerability CVE-2025-32975 Quest KACE Systems Management Appliance (SMA) Improper Authentication Vulnerability CVE-2025-48700 Synacor Zimbra Collaboration Suite (ZCS) Cross-site Scripting Vulnerability CVE-2026-20122 Cisco Catalyst SD-WAN Manager Incorrect Use of Privileged APIs Vulnerability CVE-2026-20128 Cisco Catalyst SD-WAN Manager Storing Passwords in a Recoverable Format Vulnerability CVE-2026-20133 Cisco Catalyst SD-WAN Manager Exposure of Sensitive Information to an Unauthorized Actor Vulnerability These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise.  Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities established the KEV Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant risk to the federal enterprise. BOD 22-01 requires Federal Civilian Executive Branch (FCEB) agencies to remediate identified vulnerabilities by the due date to protect FCEB networks against active threats. Se...

JetBrains TeamCity contains a relative path traversal vulnerability that could allow limited admin actions to be performed.