Quick answers
- Is CVE-2026-103488 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-103488 being exploited in the wild.
- How severe is CVE-2026-103488?
- High severity, with a CVSS score of 7.1, published 1 October 2026.
- Which products and versions are affected?
- Jetbrains YouTrack before 2026.2.19422.
- Is there a fix for CVE-2026-103488?
- Yes: fixed in 2026.2.19422. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-103488 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-103488?
- 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.
How to fix
- Fixed in: 2026.2.19422
Technical details
Missing authorization checks in YouTrack's project team management allowed authenticated users to bypass access controls and self-assign themselves to teams without proper permission validation. This affects the project team membership feature, exploitable by any authenticated user with network access to the YouTrack instance, granting unauthorized access to sensitive project data and restricted issues.
Affected products
- JetBrains YouTrack before 2026.2.19422
Timeline
- 2026-10-01: disclosed