CVE-2026-57921 Missing authorization in YouTrack
Attackers can read users' private data via the comment templates endpoint due to improper access control 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-2026-57921?
CVE-2026-57921 is a medium-severity missing authorization vulnerability in Jetbrains Youtrack, published on 26 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
In JetBrains YouTrack before 2026.2.16593 improper access control allowed reading users' private data via the comment templates endpoint
Weakness: CWE-862
Which versions are affected by CVE-2026-57921?
It affects 1 product.
Products include Jetbrains Youtrack.
How do I fix CVE-2026-57921?
No fix has been published for CVE-2026-57921 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-2026-57921 being exploited?
There is no known exploitation of CVE-2026-57921 in the wild and no public exploit code.
Other vulnerabilities in Jetbrains Youtrack
Sources
Also known as GHSA-q339-r244-45h2.