CVE-2026-95661 MISP Reflected Cross-Site Scripting in Attribute Histogram via Unescaped URL-Supplied Type List
Reflected XSS in MISP allows attackers to execute JavaScript in authenticated users' browsers via crafted URLs, potentially stealing sessions or data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-95661?
CVE-2026-95661 is a medium-severity cross-site scripting vulnerability in MISP, published on 22 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
MISP contains a reflected cross-site scripting (XSS) vulnerability in the attribute histogram view. The $selectedTypes variable, which is derived from the URL path segment , was interpolated directly into a JavaScript array literal inside an onClick HTML attribute without any encoding or escaping. An attacker who can cause an authenticated MISP user to visit a crafted URL containing a malicious type value can execute arbitrary JavaScript in the victim's browser within the MISP application origin.
Successful exploitation allows the attacker to read session cookies, perform actions on behalf of the victim, or exfiltrate sensitive data accessible from the MISP interface.
The vulnerability requires the victim to be authenticated and to actively navigate to the attacker-supplied URL.
Weakness: CWE-79
Which versions are affected by CVE-2026-95661?
How do I fix CVE-2026-95661?
No fix has been published for CVE-2026-95661 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-2026-95661 being exploited?
There is no known exploitation of CVE-2026-95661 in the wild and no public exploit code.
Sources
Also known as GHSA-3m75-rwwr-268p.