Quick answers
- Is CVE-2026-100276 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-100276 being exploited in the wild.
- How severe is CVE-2026-100276?
- Medium severity, with a CVSS score of 5.9, published 30 September 2026.
- Which products and versions are affected?
- Jetbrains YouTrack before 2026.2.19197.
- Is there a fix for CVE-2026-100276?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-100276 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-100276?
- Check whether you run Jetbrains YouTrack at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A privilege escalation vulnerability in YouTrack's workflow action handling allows unauthenticated or guest users to remove visibility restrictions from workflow actions and execute them without proper authorization. The vulnerability exists in versions before 2026.2.19197 and requires network access but no authentication bypass or special preconditions beyond guest access. An attacker can perform unauthorized workflow operations.
Affected products
- JetBrains YouTrack before 2026.2.19197
Timeline
- 2026-09-30: disclosed