CVE-2026-56672 ComfyUI: Stored XSS via /userdata/{file} due to Missing Content-Type Sanitization

ComfyUI is a node-based diffusion model GUI, API, and backend. Prior to 0.28.0, GET /userdata/file served user-controlled HTML and SVG files with extension-derived content types, allowing stored cross-site scripting in the ComfyUI origin and access to browser-stored API tokens, settings, workflow...

CVE-2026-56672

ComfyUI (node-based diffusion GUI) is affected by a stored XSS in /userdata/{file} prior to version 0.28.0. The handler used web.FileResponse(path), serving uploaded .html/.svg with extension-derived content types, which allowed embedded scripts to execute in the same-origin when a victim visited...

CVE-2026-56672 ComfyUI: Stored XSS via /userdata/{file} due to Missing Content-Type Sanitization

ComfyUI is a node-based diffusion model GUI, API, and backend. Prior to 0.28.0, GET /userdata/file served user-controlled HTML and SVG files with extension-derived content types, allowing stored cross-site scripting in the ComfyUI origin and access to browser-stored API tokens, settings, workflow...

EUVD-2026-51402

ComfyUI is a node-based diffusion model GUI, API, and backend. Prior to 0.28.0, GET /userdata/file served user-controlled HTML and SVG files with extension-derived content types, allowing stored cross-site scripting in the ComfyUI origin and access to browser-stored API tokens, settings, workflow...

CVE-2026-56672 ComfyUI: Stored XSS via /userdata/{file} due to Missing Content-Type Sanitization

ComfyUI is a node-based diffusion model GUI, API, and backend. Prior to 0.28.0, GET /userdata/file served user-controlled HTML and SVG files with extension-derived content types, allowing stored cross-site scripting in the ComfyUI origin and access to browser-stored API tokens, settings, workflow...

CVE-2026-56672

ComfyUI is a node-based diffusion model GUI, API, and backend. Prior to 0.28.0, GET /userdata/file served user-controlled HTML and SVG files with extension-derived content types, allowing stored cross-site scripting in the ComfyUI origin and access to browser-stored API tokens, settings, workflow...

CVE-2026-56671

ComfyUI is a modular diffusion model GUI, api and backend with a graph/nodes interface. Prior to 0.28.0, getmodelpreview in app/modelmanager.py joins an unrestricted filename route capture to a selected model directory without a containment check, allowing an unauthenticated remote attacker to us...

CVE-2026-56671

The CVE-2026-56671 affects ComfyUI prior to 0.28.0. Root cause: get_model_preview in app/model_manager.py constructs a path using os.path.join(folder, filename) with an unrestricted {filename} capture, allowing path traversal via literals like ../, encoded traversal, absolute paths, or an unbound...

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

ComfyUI is a modular diffusion model GUI, api and backend with a graph/nodes interface. Prior to 0.28.0, getmodelpreview in app/modelmanager.py joins an unrestricted filename route capture to a selected model directory without a containment check, allowing an unauthenticated remote attacker to us...

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

ComfyUI is a modular diffusion model GUI, api and backend with a graph/nodes interface. Prior to 0.28.0, getmodelpreview in app/modelmanager.py joins an unrestricted filename route capture to a selected model directory without a containment check, allowing an unauthenticated remote attacker to us...

EUVD-2026-51401

ComfyUI is a modular diffusion model GUI, api and backend with a graph/nodes interface. Prior to 0.28.0, getmodelpreview in app/modelmanager.py joins an unrestricted filename route capture to a selected model directory without a containment check, allowing an unauthenticated remote attacker to us...

CVE-2026-56670 ComfyUI: Stored XSS via SVG file upload on the /view endpoint

ComfyUI is a modular diffusion model GUI, api and backend with a graph/nodes interface. Prior to 0.28.0, the /view endpoint served uploaded SVG files inline because image/svg+xml and related XML content types were absent from the dangerous-content-type handling, allowing stored cross-site scripti...

CVE-2026-56670 ComfyUI: Stored XSS via SVG file upload on the /view endpoint

ComfyUI is a modular diffusion model GUI, api and backend with a graph/nodes interface. Prior to 0.28.0, the /view endpoint served uploaded SVG files inline because image/svg+xml and related XML content types were absent from the dangerous-content-type handling, allowing stored cross-site scripti...

CVE-2026-56670 ComfyUI: Stored XSS via SVG file upload on the /view endpoint

ComfyUI is a modular diffusion model GUI, api and backend with a graph/nodes interface. Prior to 0.28.0, the /view endpoint served uploaded SVG files inline because image/svg+xml and related XML content types were absent from the dangerous-content-type handling, allowing stored cross-site scripti...

CVE-2026-56670

CVE-2026-56670 : ComfyUI’s /view endpoint allowed stored XSS via uploaded SVG files prior to version 0.28.0 because image/svg+xml and related XML content types were not treated as dangerous content. The issue enabled inline serving of uploaded SVGs, permitting script execution in the ComfyUI orig...

CVE-2026-56673: Improper Limitation of a Pathname to a Restricted Directory

ComfyUI is a modular diffusion model GUI, API, and backend with a graph-and-node interface. Prior to 0.28.0, folderpaths.getannotatedfilepath and existsannotatedfilepath join workflow-controlled annotated filenames to a base directory without a containment check, allowing an unauthenticated craft...

CVE-2026-68771: Deserialization of Untrusted Data

ComfyUI v0.23.0 contains an unsafe deserialization vulnerability in the LoadTrainingDataset node that allows unauthenticated remote attackers to execute arbitrary Python code by uploading a crafted pickle file and triggering its deserialization. Attackers can upload a malicious shard.pkl file via...

CVE-2026-56670: Improper Neutralization of Input During Web Page Generation

ComfyUI is a modular diffusion model GUI, api and backend with a graph/nodes interface. Prior to 0.28.0, the /view endpoint served uploaded SVG files inline because image/svg+xml and related XML content types were absent from the dangerous-content-type handling, allowing stored cross-site scripti...

CVE-2026-56672: Improper Neutralization of Input During Web Page Generation

ComfyUI is a node-based diffusion model GUI, API, and backend. Prior to 0.28.0, GET /userdata/file served user-controlled HTML and SVG files with extension-derived content types, allowing stored cross-site scripting in the ComfyUI origin and access to browser-stored API tokens, settings, workflow...

PT-2026-66680

ComfyUI is a modular diffusion model GUI, API, and backend with a graph-and-node interface. Prior to 0.28.0, folder paths.get annotated filepath and exists annotated filepath join workflow-controlled annotated filenames to a base directory without a containment check, allowing an unauthenticated...