CVE-2026-105294

HIGH

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.

CVSS v3.1 Score

7.4
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Published: 10/5/2026Modified: 10/6/2026

Related Intelligence (1)

HIGHVulnerability

NVD HIGH: CVE-2026-105294 — Legcord 1.1.0 through 1.3.0 contains a configuration injection vulnerability tha...

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.

CVE-2026-105294
NIST NVD

References (5)

https://github.com/Legcord/Legcordhttps://github.com/Legcord/Legcord/blob/v1.3.0/src/discord/ipc.ts#L296-L299https://github.com/Legcord/Legcord/blob/v1.3.0/src/main.ts#L277-L307https://github.com/Legcord/Legcord/issues/1163https://www.vulncheck.com/advisories/legcord-1.1.0-through-1.3.0-chromium-switch-injection-via-settings-setconfig