CVE-2026-86499 JetBrains CVE debrief

Who should care

Defenders and administrators of JetBrains YouTrack systems should assess their exposure and prioritize mitigation. This includes verifying the version of JetBrains YouTrack in use, checking if it is vulnerable, and restricting access to sensitive group names and permissions. Additionally, defenders should monitor system logs for potential exploitation attempts and review system configurations and user access controls

Why it matters

CVE-2026-86499 is a medium-severity vulnerability in JetBrains YouTrack that allows predefined search fields to leak all group names to any user, regardless of visibility permissions. Defenders should prioritize verifying and mitigating this vulnerability, especially in systems where group name visibility is sensitive.

• Potential exposure of sensitive group names and permissions.
• Possible unauthorized access to sensitive information.
• Need for verification of system configurations and user access controls.
• Potential impact on system security and data confidentiality.

Technical summary

CVE-2026-86499 is a medium-severity vulnerability in JetBrains YouTrack before version 2026.1.14047. The issue allows predefined search fields to leak all group names to any user, regardless of their visibility permissions. This vulnerability could potentially expose sensitive group names and permissions, leading to unauthorized access to sensitive information. The vulnerability affects JetBrains YouTrack systems, and defenders should prioritize verifying and mitigating this vulnerability, especially in systems where group name visibility is sensitive.

Defensive priority

Defenders should prioritize verifying and mitigating this vulnerability, especially in systems where group name visibility is sensitive.

Recommended defensive actions

• Verify the version of JetBrains YouTrack in use and check if it is vulnerable.
• Restrict access to sensitive group names and permissions.
• Monitor system logs for potential exploitation attempts.

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. Further investigation is required to determine the full scope of affected systems and potential impact.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.