CVE-2026-123790

Unauthenticated Path Traversal in ComfyUI-Easy-Use Allows Remote Code Execution

Description

ComfyUI-Easy-Use version 1.3.6 contains a path traversal vulnerability in the `save_preview()` handler for POST `/easyuse/save/{name}`. The handler checks the source directory before appending a user-supplied filename and allows the request to select the `custom_nodes` directory as a copy destination. An unauthenticated attacker who can reach the ComfyUI server can overwrite an installed custom node’s Python entry point with an uploaded file. When ComfyUI restarts and loads the modified node, the attacker’s code runs with the privileges of the ComfyUI process.

Key facts

Published: 12 Nov 2026
Last changed: 12 Nov 2026
Assigned by: certcc
EPSS: 0.211% likely to be exploited in the next 30 days, higher than 11.361% of CVEs (scores for 15 Nov 2026)

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

No explicit remediation statement is available on this page yet. Consult the original record and vendor references before choosing a fix.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

Vendor	Product	Versions
ComfyUI-Easy-Use	ComfyUI-Easy-Use	1.3.6 up to and including 1.4.1 (affected)

Timeline

12 Nov 2026 Published