# CVE-2026-94277: Stored Cross-Site Scripting in MISP Galaxy Matrix Statistics via Unescaped Galaxy Name

> An authenticated galaxy editor can inject malicious scripts into galaxy names, leading to session hijacking or data theft for other users viewing statistics.

- **Severity:** Medium 6.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/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:** A user has to click or open something
- **Fix available:** No
- **Published:** 21 Sep 2026
- **Updated:** 21 Sep 2026
- **Also known as:** GHSA-8mcv-mp35-55rc

## What is CVE-2026-94277?

CVE-2026-94277 is a medium-severity cross-site scripting vulnerability in MISP, published on 21 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

MISP's galaxy matrix statistics view (app/View/Users/statistics_galaxymatrix.ctp) renders the galaxy name directly into HTML output via sprintf() without any HTML encoding. An authenticated user holding the perm_galaxy_editor permission can create or modify a galaxy whose name contains arbitrary HTML or JavaScript markup. Because the value is interpolated verbatim into the page, any user who subsequently opens the galaxy matrix statistics page will have the embedded script executed in their browser context. This enables session hijacking, credential theft, data exfiltration, or the performance of arbitrary actions on behalf of the victim within the MISP application.

Version affected: <2.5.47

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-94277?


## How do I fix CVE-2026-94277?

No fix has been published for CVE-2026-94277 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-94277 being exploited?

There is no known exploitation of CVE-2026-94277 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-94277 and fix it if it is affected.

What it is: CVE-2026-94277 is a medium-severity cross-site scripting vulnerability in MISP, published on 21 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-94277 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-2026-94277/ (Markdown: https://insights.sbomify.com/CVE-2026-94277/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-94277
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-94277
- OSV: https://osv.dev/vulnerability/CVE-2026-94277

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-94277/
Summaries are generated and may contain mistakes; the official description above is the record.