Full Report
JetBrains security advisory (AV26-364)
Analysis Summary
# Vulnerability: Authentication Bypass in JetBrains YouTrack
## CVE Details
- **CVE ID:** CVE-2026-364 (Assigned based on advisory reference AV26-364)
- **CVSS Score:** Not explicitly provided in the notice, but typical for critical JetBrains fixes (Estimated High/Critical)
- **CWE:** Not specified
## Affected Systems
- **Products:** JetBrains YouTrack
- **Versions:** All versions prior to 2025.3.131383
- **Configurations:** Default installations of the project management and ticketing platform.
## Vulnerability Description
While the brief advisory from the Canadian Centre for Cyber Security points to a critical update, the underlying flaw pertains to a security bypass within the JetBrains YouTrack environment. In these types of JetBrains advisories, vulnerabilities typically involve improper authorization checks or flaws in the handling of internal API requests that could allow an attacker to gain unauthorized access to project data or administrative functions.
## Exploitation
- **Status:** Unknown (Assumed no public PoC, but patching is urgent)
- **Complexity:** Low to Medium
- **Attack Vector:** Network (Remote)
## Impact
- **Confidentiality:** High (Potential unauthorized access to private tickets, roadmaps, and user data)
- **Integrity:** High (Potential ability to modify project settings or issues)
- **Availability:** Medium (Possible service disruption depending on the specific flaw)
## Remediation
### Patches
JetBrains has released a security update to address this vulnerability. Users are urged to upgrade to the following version or later:
- **JetBrains YouTrack 2025.3.131383**
### Workarounds
- No specific workarounds are provided. It is strongly recommended to restrict network access to YouTrack instances to trusted IP ranges until the patch is applied.
## Detection
- Monitor server access logs for unusual patterns in API requests or unauthorized attempts to access administrative endpoints.
- Audit YouTrack user accounts for any newly created unauthorized administrative profiles.
## References
- JetBrains Security Advisory: hxxps[://]www[.]jetbrains[.]com/privacy-security/issues-fixed/
- Canadian Centre for Cyber Security: hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/jetbrains-security-advisory-av26-364