Quick answers
- Is CVE-2026-103490 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-103490 being exploited in the wild.
- How severe is CVE-2026-103490?
- High severity, with a CVSS score of 7.2, published 1 October 2026.
- Which products and versions are affected?
- Jetbrains YouTrack before 2026.2.19422.
- Is there a fix for CVE-2026-103490?
- Yes: fixed in YouTrack 2026.2.19422. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-103490 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-103490?
- 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: YouTrack 2026.2.19422
Technical details
The vulnerability is a privilege escalation flaw in YouTrack's handling of user group links, allowing attackers to bypass access controls and gain higher privileges than assigned. The exact attack vector and preconditions are not detailed in the advisory, but the issue has been patched. The vulnerability affects authentication and authorization mechanisms within the group membership logic.
Affected products
- JetBrains YouTrack before 2026.2.19422
Timeline
- 2026-10-01: disclosed