CVE-2026-105294
Legcord 1.1.0 through 1.3.0 Chromium Switch Injection via settings.setConfig
CVSS Score
7.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-15 |
| Vendor | legcord |
| Product | legcord |
| Published | Oct 5, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
Legcord / Legcord
1.1.0 ≤ 1.3.0
References
github.com: https://github.com/Legcord/Legcord/issues/1163 github.com: https://github.com/Legcord/Legcord github.com: https://github.com/Legcord/Legcord/blob/v1.3.0/src/discord/ipc.ts#L296-L299 github.com: https://github.com/Legcord/Legcord/blob/v1.3.0/src/main.ts#L277-L307 vulncheck.com: https://www.vulncheck.com/advisories/legcord-1.1.0-through-1.3.0-chromium-switch-injection-via-settings-setconfig
Credits
Siyang Wu