CVE-2026-8080 MISP core - Stored XSS in MISP template (old engine) element attribute type
Stored XSS in MISP old template engine allows attackers with template modification rights to execute scripts in victim browsers.
- 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-2026-8080?
CVE-2026-8080 is a medium-severity cross-site scripting vulnerability in Misp-Project Misp, published on 7 May 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
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in misp allows Stored XSS.
This issue affects MISP before 2.5.37.
A stored cross-site scripting vulnerability exists in the template element attribute handling logic. The application accepted arbitrary values for the TemplateElementAttribute type and category fields without validating them against the known MISP attribute type and category definitions. An attacker with permission to create or modify template element attributes could store a crafted type value.
This affects the old templating (not more accessible in 2.5.37) engine from MISP which will be removed in 2.5.38
Weakness: CWE-79
Which versions are affected by CVE-2026-8080?
It affects 1 product.
Products include Misp-Project Misp.
How do I fix CVE-2026-8080?
No fix has been published for CVE-2026-8080 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-2026-8080 being exploited?
There is no known exploitation of CVE-2026-8080 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Misp-Project Misp
Sources
Also known as GHSA-3v62-pvrh-853r.