---
id: CVE-2026-56671
title: >-
  ComfyUI is a modular diffusion model GUI, api and backend with a graph/nodes
  interface
summary: >-
  ComfyUI is a modular diffusion model GUI, api and backend with a graph/nodes
  interface. Prior to 0.28.0, get_model_preview in app/model_manager.py joins an
  unrestricted filename route capture to a selected model directory without a
  conta…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-22
published: '2026-07-31'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:41:31.497'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-56671'
references:
  - url: 'https://github.com/Comfy-Org/ComfyUI/pull/14734'
    label: security-advisories@github.com
  - url: 'https://github.com/Comfy-Org/ComfyUI/releases/tag/v0.28.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/Comfy-Org/ComfyUI/security/advisories/GHSA-pj59-g5vv-74q4
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00971
epssPercentile: 0.60403
ingestedAt: '2026-08-01T23:16:01.956Z'
---

## Overview

ComfyUI is a modular diffusion model GUI, api and backend with a graph/nodes interface. Prior to 0.28.0, get_model_preview in app/model_manager.py joins an unrestricted filename route capture to a selected model directory without a containment check, allowing an unauthenticated remote attacker to use traversal, encoded traversal, absolute paths, or an unbounded path_index to read image-decodable files and enumerate host paths. get_model_preview (app/model_manager.py) built the path with os.path.join(folder, filename) where filename is an unrestricted {filename:.*} route capture. Literal ../, percent-encoded %2e%2e%2f, and absolute paths all escaped the model directory; path_index was also unbounded. The target file is piped through Pillow and re-encoded as WEBP, so disclosure is limited to image-decodable files plus a file-existence/enumeration oracle (and internal-path leakage via path_index errors). This issue is fixed in version 0.28.0.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.