Full Report
JetBrains security advisory (AV26-1050)
Analysis Summary
# Vulnerability: Multiple Vulnerabilities in JetBrains Products (October 2026)
## CVE Details
- **CVE ID:** Not explicitly listed in the advisory (Multiple CVEs covered under AV26-1050).
- **CVSS Score:** Not specified (Refer to JetBrains Fixed Security Issues portal for individual scores).
- **CWE:** Varies by product (Includes general security flaws addressed in the maintenance cycle).
## Affected Systems
- **Products:** JetBrains Datalore, Junie CLI, TeamCity, and YouTrack.
- **Versions:**
- **Datalore:** Versions prior to 2026.2.1
- **Junie CLI:** Versions prior to 26.8.3
- **TeamCity:** Versions prior to 2026.2, 2026.1.4, and 2025.11.8
- **YouTrack:** Versions prior to 2026.2.19575, 2026.3.16075, 2026.3.16397, and 2026.3.16402
- **Configurations:** Default installations of the listed software versions.
## Vulnerability Description
This advisory represents a batch release of security updates across the JetBrains ecosystem. While specific technical details for each flaw are withheld to prevent immediate exploitation, these patches typically address issues such as Cross-Site Scripting (XSS), Information Disclosure, and Potential Remote Code Execution (RCE) in server-side components (TeamCity/YouTrack).
## Exploitation
- **Status:** Not exploited (Likely discovered via internal audit or bug bounty).
- **Complexity:** Medium (Typical for enterprise CI/CD and project management tools).
- **Attack Vector:** Network (Most JetBrains products are web-based or network-connected).
## Impact
- **Confidentiality:** High (Potential access to source code, project data, and credentials).
- **Integrity:** High (Potential modification of build pipelines or project tasks).
- **Availability:** Medium (Potential for service disruption).
## Remediation
### Patches
Users should upgrade to the following versions or newer:
- **Datalore:** 2026.2.1
- **Junie CLI:** 26.8.3
- **TeamCity:** 2026.2, 2026.1.4, or 2025.11.8 (depending on release branch)
- **YouTrack:** 2026.2.19575, 2026.3.16075, 2026.3.16397, or 2026.3.16402
### Workarounds
- Limit network access to TeamCity and YouTrack instances to trusted IP ranges/VPNs.
- Ensure the principle of least privilege is applied to service accounts running these applications.
## Detection
- Monitor application logs for unusual administrative activities or unauthorized access attempts.
- Utilize vulnerability scanners to identify outdated versions of the JetBrains suite within the environment.
## References
- **Vendor Advisory:** hxxps[://]www[.]jetbrains[.]com/privacy-security/issues-fixed/
- **Security Blog:** hxxps[://]blog[.]jetbrains[.]com/security/
- **Source Bulletin:** hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/jetbrains-security-advisory-av26-1050