CVE-2026-105294 Legcord 1.1.0 through 1.3.0 Chromium Switch Injection via settings.setConfig
Attackers can inject Chromium switches to route traffic through a proxy, enabling man-in-the-middle attacks on Legcord users.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-105294?
CVE-2026-105294 is a critical vulnerability in Legcord, published on 5 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Legcord 1.1.0 through 1.3.0 contains a configuration injection vulnerability that allows script in the Discord page to write any config key via the window.legcord settings.setConfig bridge. Attackers exploiting a Discord XSS can set additionalArguments to persistently add --proxy-server and --ignore-certificate-errors switches, routing all client traffic through an interception proxy.
Weakness: CWE-15
Which versions are affected by CVE-2026-105294?
How do I fix CVE-2026-105294?
No fix has been published for CVE-2026-105294 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-105294 being exploited?
There is no known exploitation of CVE-2026-105294 in the wild and no public exploit code.
Sources
Also known as GHSA-3q64-f25r-4v38.