CVE-2026-86487: CWE-863 in JetBrains YouTrack
Description
CVE-2026-86487 is a low-severity vulnerability in JetBrains YouTrack before version 2026.2.18634. It allows users with read-only whiteboard permissions to modify canvas content by sending a crafted WebSocket message. This issue is classified under CWE-863 (Incorrect Authorization). No confidentiality or availability impact is reported.
CVSS v3.1
Score 3.1low
Affected software
JetBrains
YouTrack
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in JetBrains YouTrack versions prior to 2026.2.18634 involves improper authorization (CWE-863) where read-only whiteboard users can bypass intended restrictions and modify canvas content via a crafted WebSocket message. The CVSS 3.1 base score is 3.1, reflecting low impact with network attack vector, high attack complexity, low privileges required, no user interaction, unchanged scope, no confidentiality or availability impact, and limited integrity impact.
Potential Impact
The vulnerability allows unauthorized modification of whiteboard canvas content by users who should only have read-only access. There is no impact on confidentiality or availability, and the integrity impact is limited to the whiteboard canvas content. No known exploits are reported in the wild.
Mitigation Recommendations
A fix is available in JetBrains YouTrack version 2026.2.18634. Users should upgrade to this version or later to remediate the vulnerability. Since this is not a cloud service, remediation depends on user action to apply the patch. Patch status is confirmed by the affectedVersions data indicating the fixed version.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- JetBrains
- Date Reserved
- 2026-09-07T16:13:36.285Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a9ee859acd9273b49f0e40e
Added to database: 09/07/2026, 16:37:45 UTC
Last enriched: 09/15/2026, 01:17:58 UTC
Last updated: 10/11/2026, 06:48:19 UTC
Views: 56
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