CVE-2026-105294

critical · 9.1

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.

9.1

CVSS

0.2%

EPSS (exploit prob.)

8th

EPSS percentile

2026-10-05

Published

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weaknesses

CWE-15

References

https://github.com/Legcord/Legcord
https://github.com/Legcord/Legcord/blob/v1.3.0/src/discord/ipc.ts#L296-L299
https://github.com/Legcord/Legcord/blob/v1.3.0/src/main.ts#L277-L307
https://github.com/Legcord/Legcord/issues/1163
https://www.vulncheck.com/advisories/legcord-1.1.0-through-1.3.0-chromium-switch-injection-via-settings-setconfig

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-105294