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CVE-2026-56671— ComfyUI: Path traversal in /experiment/models/preview allows arbitrary image file read

CVSS 7.5 · High EPSS 0.66% · P48

Affected Version Matrix 1

VendorProductVersion RangeStatus
Comfy-OrgComfyUI< 0.28.0affected
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I. Basic Information for CVE-2026-56671

Vulnerability Information
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Vulnerability Title
ComfyUI: Path traversal in /experiment/models/preview allows arbitrary image file read
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5

Affected Products

VendorProductAffected VersionsCPESubscribe
Comfy-OrgComfyUI < 0.28.0 -

II. Public POCs for CVE-2026-56671

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 8207 chars
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III. Intelligence Information for CVE-2026-56671

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Patches & Fixes for CVE-2026-56671 (1)

Vendor Advisories for CVE-2026-56671 (1)

Other References for CVE-2026-56671 (1)

Same Patch Batch · Comfy-Org · 2026-07-31 · 5 CVEs total

CVE-2026-687719.8 CRITICALComfyUI 0.23.0 Unauthenticated RCE via LoadTrainingDataset Pickle Deserialization
CVE-2026-566708.2 HIGHComfyUI: Stored XSS via SVG file upload on the /view endpoint
CVE-2026-566728.2 HIGHComfyUI: Stored XSS via /userdata/{file} due to Missing Content-Type Sanitization
CVE-2026-566737.5 HIGHComfyUI: Path traversal in LoadImage via the /prompt API allows arbitrary file existence p

IV. Related Vulnerabilities

Same product: ComfyUI
Same vendor: Comfy-Org
Same weakness: CWE-22

V. Comments for CVE-2026-56671

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