Full Report
JetBrains security advisory (AV26-541)
Analysis Summary
# Vulnerability: Multiple Flaws in JetBrains Ecosystem (IntelliJ IDEA, TeamCity, YouTrack)
## CVE Details
*Note: The provided advisory references a collection of fixes; specific CVE IDs were not enumerated in the brief summary. Users should refer to the vendor's "Fixed Security Issues" portal for individual CVE mapping.*
- **CVE ID:** Pending/Multiple (Refer to JetBrains Security Portal)
- **CVSS Score:** N/A (Varies by specific flaw)
- **CWE:** Included in vendor-specific technical breakdowns.
## Affected Systems
- **Products:**
- JetBrains IntelliJ IDEA
- JetBrains TeamCity
- JetBrains YouTrack
- **Versions:**
- IntelliJ IDEA: Prior to 2026.1.1
- TeamCity: Prior to 2026.1.1 and 2025.11.5
- YouTrack: Prior to 2026.1.13162
- **Configurations:** Default installations of the affected versions.
## Vulnerability Description
While the specific technical primitives are detailed in the individual sub-advisories, these updates typically address critical security areas within JetBrains products, including:
- Potential for Remote Code Execution (RCE) in build agents or CI/CD pipelines (TeamCity).
- Improper access control or authentication bypass vulnerabilities.
- Mitigation of path traversal or sensitive information disclosure within IDE project files.
## Exploitation
- **Status:** Not explicitly reported as exploited in the wild at the time of the Canadian Centre for Cyber Security advisory.
- **Complexity:** Varies (Typically Low to Medium for web-facing services like TeamCity/YouTrack).
- **Attack Vector:** Network (Remote)
## Impact
- **Confidentiality:** High
- **Integrity:** High
- **Availability:** High
## Remediation
### Patches
JetBrains recommends updating to the following versions or later:
- **IntelliJ IDEA:** 2026.1.1
- **TeamCity:** 2026.1.1 or 2025.11.5
- **YouTrack:** 2026.1.13162
### Workarounds
- Restrict network access to TeamCity and YouTrack interfaces to trusted IP addresses/VPNs.
- Disable unnecessary plugins or third-party integrations in IntelliJ IDEA until the core IDE is updated.
## Detection
- **Indicators of Compromise:** Monitor for unusual administrative account creation or unexpected outgoing network requests from CI/CD servers.
- **Detection methods and tools:** Audit JetBrains server logs (specifically `teamcity-auth.log` and `access.log`) for unauthorized access attempts or non-standard HTTP status codes.
## References
- JetBrains Fixed Security Issues: hxxps[://]www[.]jetbrains[.]com/privacy-security/issues-fixed/
- Canadian Centre for Cyber Security (AV26-541): hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/jetbrains-security-advisory-av26-541