# CVE-2026-100266: Missing authorization in Hub

> Authenticated users can send arbitrary emails from the server's trusted address due to missing authorization checks in JetBrains Hub.

- **Severity:** High 7.7 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 30 Sep 2026
- **Updated:** 30 Sep 2026
- **Also known as:** GHSA-f59m-626g-488f

## 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 (Missing Authorization)

## Which versions are affected by CVE-2026-100266?

It affects 1 product.


Products: 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.

## 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](https://insights.sbomify.com/CVE-2026-50242/): Auth bypass in Hub (critical 10.0)
- [CVE-2026-56141](https://insights.sbomify.com/CVE-2026-56141/): Weak cryptography in Hub (critical 9.8)
- [CVE-2022-25262](https://insights.sbomify.com/CVE-2022-25262/): Auth bypass in n/a (critical 9.8)
- [CVE-2021-43183](https://insights.sbomify.com/CVE-2021-43183/): Security feature bypass in n/a (critical 9.8)
- [CVE-2021-36209](https://insights.sbomify.com/CVE-2021-36209/): Auth bypass in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-100266 and fix it if it is affected.

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

Affected product: JetBrains Hub. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-100266/ (Markdown: https://insights.sbomify.com/CVE-2026-100266/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-100266
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-100266
- OSV: https://osv.dev/vulnerability/CVE-2026-100266

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-100266/
Summaries are generated and may contain mistakes; the official description above is the record.