CVE-2026-100266 Missing authorization in Hub

What is CVE-2026-100266?

CVE-2026-100266 is a high-severity missing authorization vulnerability in JetBrains Hub, published on 30 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

In JetBrains Hub before 2026.2.52366 missing authorisation allowed authenticated users to send arbitrary emails from the server's trusted address

Weakness: CWE-862

Which versions are affected by CVE-2026-100266?

It affects 1 product.

Products include Jetbrains Hub.

How do I fix CVE-2026-100266?

No fix has been published for CVE-2026-100266 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-100266 being exploited?

There is no known exploitation of CVE-2026-100266 in the wild and no public exploit code.

Other vulnerabilities in JetBrains Hub

• CVE-2026-50242 Auth bypass in Hub Critical 10.0
• CVE-2026-56141 Weak cryptography in Hub Critical 9.8
• CVE-2022-25262 Auth bypass in n/a Critical 9.8
• CVE-2021-43183 Security feature bypass in n/a Critical 9.8
• CVE-2021-36209 Auth bypass in n/a Critical 9.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-f59m-626g-488f.