CVE-2026-105294 Legcord - Configuration Injection

Legcord 1.1.0 through 1.3.0 contains a configuration injection vulnerability caused by improper validation in window.legcord settings.setConfig bridge, letting attackers exploiting Discord XSS persistently modify client config, exploit requires Discord XSS.

CVSS base score 7.4 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.19% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Configuration Injection
Impact
Man In The Middle
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Published
5 October 2026
Updated
15 October 2026
Weakness
CWE-15

Vendor fix

Update to the latest version that fixes the configuration injection vulnerability.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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