CVE-2026-86493: CWE-863 in JetBrains YouTrack
Description
CVE-2026-86493 is a vulnerability in JetBrains YouTrack before version 2026.2.18634 where improper permission checks allowed users with read-only access to create and modify whiteboard cards. This issue is classified under CWE-863 (Incorrect Authorization). The vulnerability has a CVSS 3.1 score of 6.5, indicating a medium severity level. No known exploits in the wild have been reported. The affected versions are all releases prior to 2026.2.18634.
CVSS v3.1
Score 6.5medium
Affected software
JetBrains
YouTrack
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
JetBrains YouTrack versions before 2026.2.18634 contain an authorization flaw (CWE-863) that permits users with read-only permissions to create and modify whiteboard cards, which should normally be restricted. This improper permission check can lead to unauthorized modification of whiteboard content. The vulnerability has a CVSS 3.1 base score of 6.5 (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N), indicating network attack vector, low attack complexity, requires low privileges, no user interaction, unchanged scope, no confidentiality impact, high integrity impact, and no availability impact.
Potential Impact
The vulnerability allows read-only users to perform unauthorized modifications on whiteboard cards, impacting the integrity of data within YouTrack. There is no impact on confidentiality or availability. This could lead to unauthorized changes that may affect project tracking or collaboration accuracy.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official patch or fix link is provided, users should monitor JetBrains advisories for updates and consider restricting read-only user access to whiteboard features until a fix is available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- JetBrains
- Date Reserved
- 2026-09-07T16:13:37.856Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a9ee859acd9273b49f0e41c
Added to database: 09/07/2026, 16:37:45 UTC
Last enriched: 09/15/2026, 01:18:29 UTC
Last updated: 10/21/2026, 13:22:15 UTC
Views: 57
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