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6.5

JetBrains YouTrack read-only users can edit whiteboard cards

CVE-2026-86493 · published 1 month ago
Summary

In JetBrains YouTrack versions before the 2026.2.18634 update, users who are only supposed to view information could nonetheless add or change cards on whiteboards. This could let unauthorized people alter project planning data or hide information. Upgrade YouTrack to the latest release or apply the provided patch to restore proper read‑only restrictions.

What to do
  • Update jetbrains youtrack to version 2026.2.18634 or later.
Affected software
VendorProductAffected versions
jetbrains youtrack < 2026.2.18634
Original advisory text
In JetBrains YouTrack before 2026.2.18634 improper permission checks allowed read-only users to create and modify whiteboard cards
In JetBrains YouTrack before 2026.2.18634 improper permission checks allowed read-only users to create and modify whiteboard cards
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
6.5 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-863Incorrect Authorization
Timeline
Published7 Sep 2026
Updated3 Nov 2026
First seen8 Sep 2026
Sources
CVE-2026-86493 · NVD
CVE-2026-86493 · MITRE
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