CVE-2026-105294
CVE-2026-105294
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.
Published .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Weakness classification (CWE)
References
- github.com/Legcord/Legcord/issues/1163 (issue-tracking)
- github.com/Legcord/Legcord (product)
- github.com/Legcord/Legcord/blob/v1.3.0/src/discord/ipc.ts (technical-description)
- github.com/Legcord/Legcord/blob/v1.3.0/src/main.ts (technical-description)
- www.vulncheck.com/advisories/legcord-1.1.0-through-1.3.0-chromium-switch-inject… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-105294?
- CVE-2026-105294 is a high-severity vulnerability, classified under CWE-15. CVSS score: 7.4/10. Published 2026-10-05.
- How severe is CVE-2026-105294?
- High severity. CVSS v3 base score is 7.4 out of 10.