CVE-2026-86487 Missing authorization in YouTrack
Read-only users can modify whiteboard content in JetBrains YouTrack due to missing authorization checks on WebSocket messages.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-86487?
CVE-2026-86487 is a low-severity missing authorization vulnerability in JetBrains YouTrack, published on 7 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
In JetBrains YouTrack before 2026.2.18634 a crafted WebSocket message allowed read-only whiteboard users to modify canvas content
Weakness: CWE-863
Which versions are affected by CVE-2026-86487?
How do I fix CVE-2026-86487?
No fix has been published for CVE-2026-86487 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-86487 being exploited?
There is no known exploitation of CVE-2026-86487 in the wild and no public exploit code.
Sources
Also known as GHSA-8g79-9363-v5v2.