# CVE-2026-94394: Missing authorization in MISP

> Authenticated users can bypass sharing group restrictions to view sensitive attributes and objects within accessible MISP events.

- **Severity:** Medium 6.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA: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:** 21 Sep 2026
- **Updated:** 21 Sep 2026
- **Also known as:** GHSA-cj24-5f9w-vhx6

## What is CVE-2026-94394?

CVE-2026-94394 is a medium-severity missing authorization vulnerability in MISP, published on 21 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

When a regular user adds a reference between objects or attributes, MISP checks whether the user can access the overall event, but it does not always check whether the individual pieces of data are also allowed for that user.

Because of this, someone who can view an event could potentially access attributes or objects inside that event that were meant to be restricted to a specific sharing group or distribution level.

The vulnerability affects authenticated users who are not site administrators and who already have access to an event containing more restricted data.

The main impact is that users may be able to view sensitive attribute values, object details, or related object data that they should not normally be allowed to see.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-94394?


## How do I fix CVE-2026-94394?

No fix has been published for CVE-2026-94394 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-94394 being exploited?

There is no known exploitation of CVE-2026-94394 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-94394 and fix it if it is affected.

What it is: CVE-2026-94394 is a medium-severity missing authorization vulnerability in MISP, published on 21 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-2026-94394 in the wild and no public exploit code.

Affected product: MISP. 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-2026-94394/ (Markdown: https://insights.sbomify.com/CVE-2026-94394/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-94394
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-94394
- OSV: https://osv.dev/vulnerability/CVE-2026-94394

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-94394/
Summaries are generated and may contain mistakes; the official description above is the record.