CVE-2026-56671Network attack vector

Unauthenticated image file read via path traversal

Published Jul 31, 2026 · Updated Jul 31, 2026

Path traversal in ComfyUI before 0.28.0 allows remote attackers to read image-decodable host files through the model-preview endpoint. In app/model_manager.py, get_model_preview passes an unrestricted filename route capture to os.path.join without verifying that the resolved path remains under the selected model directory. The route requires no authentication, but default instances bind to localhost; Pillow decoding limits direct reads to supported image formats, while errors expose file existence and internal paths.

CVSS severity7.5
High
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in ComfyUI before 0.28.0 allows remote attackers to read image-decodable host files through the model-preview endpoint. In app/model_manager.py, get_model_preview passes an unrestricted filename route capture to os.path.join without verifying that the resolved path remains under the selected model directory. The route requires no authentication, but default instances bind to localhost; Pillow decoding limits direct reads to supported image formats, while errors expose file existence and internal paths.

The record

CVE
CVE-2026-56671
Published
Jul 31, 2026
Updated
Jul 31, 2026
Vendor
Comfy Org
Product
ComfyUI
Classifications
CWE-22, T1190, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 31, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.28.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Comfy Org · ComfyUIversion=< 0.28.0

Published CVSS scores

7.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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