CVE-2026-86490: CWE-863 in JetBrains YouTrack
Description
In JetBrains YouTrack before 2026.2.18634 improper permission checks allowed overwriting of bundled apps via the app import endpoint
CVSS v3.1
Score 6.5medium
Affected software
pkg:github/jetbrains/YouTrackRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-86490 describes a permission validation weakness in JetBrains YouTrack before version 2026.2.18634. The vulnerability allows users with limited privileges (PR:L) to overwrite bundled apps through the app import endpoint, due to improper permission checks. The CVSS 3.1 base score is 6.5 (medium severity), reflecting network attack vector, low attack complexity, no user interaction, and impact limited to integrity (I:H) without confidentiality or availability impact.
Potential Impact
An attacker with some privileges can overwrite bundled applications, potentially altering application behavior or injecting malicious code. There is no direct confidentiality or availability impact reported. The integrity of the application is compromised, which could affect trustworthiness and operation of the affected apps.
Mitigation Recommendations
Upgrade JetBrains YouTrack to version 2026.2.18634 or later, where this improper permission check vulnerability has been fixed. No other mitigation guidance is provided or necessary as the fix is available in the official release.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-v3fg-v2j9-f7gp
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-86490"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a9f9115acd9273b49ff2bec
Added to database: 09/08/2026, 04:37:41 UTC
Last enriched: 09/08/2026, 05:08:15 UTC
Last updated: 10/23/2026, 15:12:06 UTC
Views: 77
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