# CVE-2026-94393: MISP Event Report Cross-Event Reparenting via Unscoped UUID Resolution in editReport

> Attackers with editor access can move reports between events by guessing UUIDs, exposing or modifying private data across event boundaries.

- **Severity:** Medium 6.4 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/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-rq8q-gvp5-cmqp

## What is CVE-2026-94393?

CVE-2026-94393 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 user creates or edits a report inside an event, MISP can identify an existing report using its UUID without properly checking whether that report actually belongs to the same event.

As a result, a user who has editing rights on one event could potentially move a report from another event into their own event, as long as they know or can guess the report’s UUID. Once moved, they could view and change information that they were not originally allowed to access.

The vulnerability requires the attacker to have editor access to at least one event and to know or discover a valid report UUID.

The main impact is that private event reports could be exposed or modified across event boundaries, bypassing MISP’s normal access restrictions.

Version affected: <2.5.47

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key), CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2026-94393?


## How do I fix CVE-2026-94393?

No fix has been published for CVE-2026-94393 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-94393 being exploited?

There is no known exploitation of CVE-2026-94393 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-94393 and fix it if it is affected.

What it is: CVE-2026-94393 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-2026-94393 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-2026-94393/ (Markdown: https://insights.sbomify.com/CVE-2026-94393/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-94393
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-94393
- OSV: https://osv.dev/vulnerability/CVE-2026-94393

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-94393/
Summaries are generated and may contain mistakes; the official description above is the record.