CVE-2026-105293: Legcord 1.1.0 through 1.3.0 Path Traversal via Theme IPC Handlers

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-05 · updated 2026-10-06
Weakness: CWE-22

Description

Legcord 1.1.0 through 1.3.0 contains a path traversal vulnerability in theme IPC handlers that allows script in the Discord page to escape the themes directory via unvalidated theme ids. Attackers running script in the Discord origin, such as through XSS, can abuse themes.folder, themes.uninstall, and themes.install to launch local executables, recursively delete directories, and write files outside the themes directory.

Affected products

Legcord: from 1.1.0 through 1.3.0

References

https://github.com/Legcord/Legcord
https://github.com/Legcord/Legcord/blob/v1.3.0/src/common/themes.ts#L269-L276
https://github.com/Legcord/Legcord/blob/v1.3.0/src/discord/ipc.ts#L201-L206
https://github.com/Legcord/Legcord/issues/1163
https://www.vulncheck.com/advisories/legcord-1.1.0-through-1.3.0-path-traversal-via-theme-ipc-handlers

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