Is CVE-2026-100266 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-100266 being exploited in the wild.

How severe is CVE-2026-100266?

High severity, with a CVSS score of 7.7, published 30 September 2026.

Which products and versions are affected?

Jetbrains Hub before 2026.2.52366.

Is there a fix for CVE-2026-100266?

A patch was published on 2026-09-30: Fixed in version 2026.2.52366 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-100266 attacked?

It is attacked over the network.

Am I affected by CVE-2026-100266?

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.

CVE-2026-100266: JetBrains Hub authorization bypass in email sending

CVE-2026-100266 · Severity: high · CVSS 7.7 · Published 2026-09-30

JetBrains Hub, a team collaboration platform, contains an authorization bypass that allows authenticated users to send emails from the server's trusted email address without proper permission checks. An attacker with valid credentials could impersonate the server and send phishing or fraudulent emails to any recipient, damaging organizational reputation and potentially compromising other users.

Technologies: Jetbrains Hub. Vendors: Jetbrains.

Quick answers

Is CVE-2026-100266 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-100266 being exploited in the wild.
How severe is CVE-2026-100266?: High severity, with a CVSS score of 7.7, published 30 September 2026.
Which products and versions are affected?: Jetbrains Hub before 2026.2.52366.
Is there a fix for CVE-2026-100266?: A patch was published on 2026-09-30: Fixed in version 2026.2.52366 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-100266 attacked?: It is attacked over the network.
Am I affected by CVE-2026-100266?: 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.

Technical details

The vulnerability is a missing authorization check in the email-sending functionality of JetBrains Hub. Authenticated users can craft requests to send arbitrary emails using the server's trusted email address, bypassing access controls. This requires prior authentication but no additional user interaction, allowing lateral privilege escalation within the application.

Affected products

JetBrains Hub before 2026.2.52366

Timeline

2026-09-30: disclosed
2026-09-30: patched: Fixed in version 2026.2.52366

References

https://www.jetbrains.com/privacy-security/issues-fixed/

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