CVE-2026-103491 Missing authorization in YouTrack
An insecure direct object reference in the issue activities API allows attackers to read restricted issues in JetBrains YouTrack.
- 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-2026-103491?
CVE-2026-103491 is a medium-severity missing authorization vulnerability in Jetbrains Youtrack, published on 1 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
In JetBrains YouTrack before 2026.2.19422 iDOR in the issue activities API allowed reading restricted issues
Weakness: CWE-639
Which versions are affected by CVE-2026-103491?
It affects 1 product.
Products include Jetbrains Youtrack.
How do I fix CVE-2026-103491?
No fix has been published for CVE-2026-103491 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-2026-103491 being exploited?
There is no known exploitation of CVE-2026-103491 in the wild and no public exploit code.
Other vulnerabilities in Jetbrains Youtrack
Sources
Also known as GHSA-cxjv-qhfq-qm94.