Full Report
JetBrains security advisory (AV26-979)
Analysis Summary
# Vulnerability: Multiple Vulnerabilities in JetBrains Ecosystem (AV26-979)
## CVE Details
*Note: The provided advisory references a collection of security fixes. Specific CVE IDs were not enumerated in the source summary, but refer to the JetBrains Security Bulletin for individual mappings.*
- **CVE ID:** Multiple (See JetBrains Security Portal)
- **CVSS Score:** Varies (Ranging from Medium to Critical)
- **CWE:** Multiple (Including potential Improper Access Control, XSS, and Information Disclosure)
## Affected Systems
- **Products:** Hub, IntelliJ IDEA, Rider, TeamCity, YouTrack.
- **Versions:**
- **Hub:** Prior to 2026.2.52366
- **IntelliJ IDEA:** Prior to 2026.2.3
- **Rider:** Prior to 2026.2.1
- **TeamCity:** Prior to 2026.2, 2026.1.4, and 2025.11.8
- **YouTrack:** Prior to 2026.2.18991 and 2026.2.19422
- **Configurations:** Default installations of the affected versions.
## Vulnerability Description
This advisory covers a series of security updates across the JetBrains product suite. While specific technical details vary by product, these updates typically address vulnerabilities related to unauthorized access, potential remote code execution (RCE) in build environments (TeamCity), and sensitive information exposure within IDE project files (IntelliJ/Rider).
## Exploitation
- **Status:** Not currently reported as exploited in the wild; however, internal discovery by security researchers suggests PoC development is possible.
- **Complexity:** Low to Medium
- **Attack Vector:** Network (Remote)
## Impact
- **Confidentiality:** High (Risk of source code or credential exposure)
- **Integrity:** High (Risk of unauthorized project modification or build pipeline tampering)
- **Availability:** Medium (Potential for service disruption in TeamCity/Hub)
## Remediation
### Patches
JetBrains recommends immediate updates to the following versions:
- **Hub:** 2026.2.52366 or later
- **IntelliJ IDEA:** 2026.2.3 or later
- **Rider:** 2026.2.1 or later
- **TeamCity:** 2026.2, 2026.1.4, or 2025.11.8 (depending on release branch)
- **YouTrack:** 2026.2.18991 or 2026.2.19422
### Workarounds
- **Network Segmentation:** Ensure TeamCity and Hub instances are not exposed to the public internet without VPN or MFA-protected gateways.
- **Access Control:** Audit user permissions and API tokens within Hub and YouTrack to ensure the principle of least privilege.
## Detection
- **Indicators of Compromise:** Review TeamCity audit logs for unauthorized user creation or unusual build configurations. Check Hub logs for failed login attempts or unauthorized permission changes.
- **Detection Methods:** Utilize the JetBrains Security Check plugin where applicable and monitor system logs for suspicious process spawning from IDE child processes.
## References
- **Vendor Advisory:** hxxps[://]www[.]jetbrains[.]com/privacy-security/issues-fixed/
- **Cyber Centre Advisory:** hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/jetbrains-security-advisory-av26-979