CVE-2026-100274 Denial of service in YouTrack
A project admin can cause a denial of service in JetBrains YouTrack by exploiting a flaw in notification templates.
- 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-2026-100274?
CVE-2026-100274 is a medium-severity denial of service vulnerability in Jetbrains Youtrack, published on 30 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
In JetBrains YouTrack before 2026.2.19197 project Admin could trigger DoS via a notification template
Weakness: CWE-770
Which versions are affected by CVE-2026-100274?
It affects 1 product.
Products include Jetbrains Youtrack.
How do I fix CVE-2026-100274?
No fix has been published for CVE-2026-100274 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-100274 being exploited?
There is no known exploitation of CVE-2026-100274 in the wild and no public exploit code.
Other vulnerabilities in Jetbrains Youtrack
Sources
Also known as GHSA-hv7q-vr88-8r7f.