CVE-2026-86487: CWE-863 in JetBrains YouTrack
Description
In JetBrains YouTrack before 2026.2.18634 a crafted WebSocket message allowed read-only whiteboard users to modify canvas content
CVSS v3.1
Score 3.1low
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
In JetBrains YouTrack versions prior to 2026.2.18634, a crafted WebSocket message could be used by users with read-only access to the whiteboard feature to modify the canvas content. This represents an authorization bypass issue (CWE-863) where the intended read-only restriction is circumvented. The vulnerability has a CVSS 3.1 base score of 3.1, indicating low severity, with network attack vector, high attack complexity, low privileges required, no user interaction, unchanged scope, no confidentiality impact, limited integrity impact, and no availability impact.
Potential Impact
An attacker with read-only whiteboard access can alter the canvas content, potentially causing misinformation or disruption of collaborative work. There is no impact on confidentiality or availability, and the integrity impact is limited to the whiteboard canvas content only.
Mitigation Recommendations
Upgrade JetBrains YouTrack to version 2026.2.18634 or later where this vulnerability is fixed. No other mitigation or temporary workaround is indicated in the available data.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-8g79-9363-v5v2
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-86487"]
- Database Specific Severity
- LOW
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a9f9117acd9273b49ff2d1c
Added to database: 09/08/2026, 04:37:43 UTC
Last enriched: 09/08/2026, 04:53:38 UTC
Last updated: 10/22/2026, 13:15:24 UTC
Views: 78
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