CVE-2026-109558 EdgeEver 1.6.0 through 1.112.0 Stored XSS via TemplatesPane Template Preview
Attackers can inject malicious scripts into EdgeEver templates to execute code and access privileged desktop bridges via stored XSS.
- 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-2026-109558?
CVE-2026-109558 is a high-severity cross-site scripting vulnerability in tianma-if EdgeEver, published on 12 Oct 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
EdgeEver 1.6.0 through 1.112.0 contains a stored cross-site scripting vulnerability in TemplatesPane.tsx that renders template contentMarkdown with raw HTML via dangerouslySetInnerHTML without sanitization. Attackers can write templates containing HTML event handlers through an API or MCP token to run script on preview and access the privileged window.edgeeverDesktop bridge.
Weakness: CWE-79
Which versions are affected by CVE-2026-109558?
How do I fix CVE-2026-109558?
No fix has been published for CVE-2026-109558 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-2026-109558 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-109558 exists.
Sources
Also known as GHSA-f2xf-xr5r-qf3x.