Quick answers
- Is CVE-2026-86492 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-86492 being exploited in the wild.
- How severe is CVE-2026-86492?
- High severity, with a CVSS score of 8.5, published 7 September 2026.
- Which products and versions are affected?
- Jetbrains YouTrack before 2026.2.18634.
- Is there a fix for CVE-2026-86492?
- A patch was published on 2026-02-18634: Fixed in YouTrack 2026.2.18634 and later Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-86492 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-86492?
- 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
YouTrack uses a shared token cache for GitHub App installation tokens without proper tenant isolation. An attacker with access to one YouTrack tenant instance could retrieve cached tokens belonging to other tenants, bypassing authentication and authorization controls. The vulnerability affects YouTrack versions before 2026.2.18634. This is a cross-tenant data exposure issue resulting from insufficient cache compartmentalization. The issue has been patched in version 2026.2.18634 and later.
Affected products
- JetBrains YouTrack before 2026.2.18634
Timeline
- 2026-09-07: disclosed
- 2026-02-18: patched: Fixed in YouTrack 2026.2.18634 and later