Quick answers
- Is CVE-2026-123294 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-123294 being exploited in the wild.
- How severe is CVE-2026-123294?
- Critical severity, with a CVSS score of 9.6, published 6 November 2026.
- Which products and versions are affected?
- Jetbrains Hub before 2026.2.52556.
- Is there a fix for CVE-2026-123294?
- Yes: fixed in 2026.2.52556. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-123294 attacked?
- It is attacked over the network, in a hosted service.
- Am I affected by CVE-2026-123294?
- Check whether you run Jetbrains Hub 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: 2026.2.52556
Technical details
The vulnerability exists in JetBrains Hub's email authentication verification flow, where insufficient validation allows an attacker to modify email authentication details mid-verification. This can result in privilege escalation, allowing an attacker to assume higher privileges or take over accounts. The attack requires network access and interaction with the verification flow but no prior authentication.
Affected products
- JetBrains Hub before 2026.2.52556
Timeline
- 2026-11-06: disclosed