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.
- 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
- None listed
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
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.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-94277 being exploited?
There is no known exploitation of CVE-2026-94277 in the wild and no public exploit code.
Sources
Also known as GHSA-8mcv-mp35-55rc.