CVE-2026-86479: High severity JetBrains YouTrack vulnerability

Q: What level of access does an attacker need to exploit this issue?

An attacker needs low-privileged access to YouTrack. No user interaction is required, and the issue can be exploited remotely over the network.

Q: What is the impact if exploitation succeeds?

The missing authorization checks can allow access to restricted REST API resources through an insecure direct object reference. This can result in high-impact confidentiality and integrity compromise; availability impact is not indicated.

Q: Which YouTrack releases contain fixes?

The issue is fixed in YouTrack 2026.2.18788, 2026.1.14055, and 2025.3.161254. Versions earlier than these listed releases are affected.

Published Sep 7, 2026

Updated

In JetBrains YouTrack before 2026.2.18788, 2026.1.14055, 2025.3.161254 missing authorisation allowed access to restricted REST API resources via IDOR

Affected Software

1 affected component

JetBrains YouTrack<2026.2.18788, =2026.1.14055, =2025.3.161254

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade JetBrains YouTrack to a version that resolves this vulnerability.
Fixed in 2026.2.18788

Event History

Sep 7, 2026

CVE Published

via MITRE·04:26 PM

Data Sourced

via MITRE·04:26 PM

DescriptionSeverityWeakness

Frequently Asked Questions

What level of access does an attacker need to exploit this issue?

An attacker needs low-privileged access to YouTrack. No user interaction is required, and the issue can be exploited remotely over the network.

What is the impact if exploitation succeeds?