CVE-2026-94373 MISP DOM-based Cross-Site Scripting via innerHTML in Contextual Menu
Attackers can inject malicious scripts into MISP contextual menus via innerHTML, potentially hijacking sessions or stealing data from authenticated users.
- 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-2026-94373?
CVE-2026-94373 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 contains a DOM-based cross-site scripting (XSS) vulnerability in the contextual menu JavaScript component. The ContextualMenu class populates HTML <option> elements by assigning user-controllable values to the innerHTML property. Because innerHTML parses and renders HTML markup, any untrusted string supplied as the option text (value.text or value) is interpreted as live DOM content rather than plain text. An attacker who can influence the data rendered in the contextual menu can inject arbitrary HTML or JavaScript that executes in the victim's browser within the MISP application origin. This may allow session hijacking, data exfiltration, or unauthorized actions performed on behalf of the authenticated user.
Version affected: <2.5.47
Weakness: CWE-79
Which versions are affected by CVE-2026-94373?
How do I fix CVE-2026-94373?
No fix has been published for CVE-2026-94373 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-2026-94373 being exploited?
There is no known exploitation of CVE-2026-94373 in the wild and no public exploit code.
Sources
Also known as GHSA-6m7x-x7f7-6wjc.