CVE-2026-105294
Legcord 1.1.0 through 1.3.0 Chromium Switch Injection via settings.setConfig
- State
- Published
- Severity
- 9.1 Critical
- Published
- Oct 5, 2026
- Updated
- Oct 5, 2026
- Reserved
- Oct 5, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.1 Critical | 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 | VulnCheck |
| 3.1 | 7.4 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N | VulnCheck |
Weaknesses
- CWE-15 External Control of System or Configuration Setting
Affected Products
| Product | Versions |
|---|---|
LegcordLegcord |
|
References
- GitHub Issue #1163issue-tracking
- https://github.com/Legcord/Legcordproduct
- https://github.com/Legcord/Legcord/blob/v1.3.0/src/discord/ipc.ts#L296-L299technical-description
- https://github.com/Legcord/Legcord/blob/v1.3.0/src/main.ts#L277-L307technical-description
- VulnCheck Advisory: Legcord 1.1.0 through 1.3.0 Chromium Switch Injection via settings.setConfigthird-party-advisory
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