CVE-2026-56670
HighCVSS 8.2Exploitation Probability (EPSS)
Low risk13th percentile - higher than 13% of all known CVEs
Summary
ComfyUI prior to version 0.28.0 is vulnerable to stored cross-site scripting (XSS) in the /view endpoint. It serves uploaded SVG files inline because image/svg+xml and related content types were not handled as dangerous, allowing script execution in the ComfyUI origin.
Risk Assessment
An attacker can execute malicious scripts in the victim's browser, potentially leading to credential theft or other actions in the ComfyUI context.
Recommendation
Update ComfyUI to version 0.28.0 or later.
Other vulnerabilities in ComfyUI
See all- CVE-2026-68771Critical
ComfyUI v0.23.0 contains an unsafe deserialization vulnerability in the LoadTrainingDataset node. An unauthenticated attacker can upload a crafted pickle file via the POST /upload/image endpoint and trigger its deserialization via POST /prompt, leading to arbitrary Python code execution through torch.load.
- CVE-2026-56673High
ComfyUI prior to version 0.28.0 is vulnerable in folder_paths.get_annotated_filepath and exists_annotated_filepath. They join workflow-controlled filenames to a base directory without containment check, allowing an unauthenticated attacker to craft a POST /prompt request using LoadImage or similar nodes to probe arbitrary host paths and exfiltrate image-format files through /view.
- CVE-2026-56672High
ComfyUI prior to version 0.28.0 is vulnerable to stored cross-site scripting (XSS) in the GET /userdata/{file} endpoint. It serves user-controlled HTML and SVG files with extension-derived content types, allowing script execution in the ComfyUI origin and access to API tokens, settings, workflows, and authenticated-equivalent API calls.
- CVE-2026-56671High
ComfyUI prior to version 0.28.0 is vulnerable in the get_model_preview function in app/model_manager.py. It joins an unrestricted filename to a selected model directory without containment check, allowing an unauthenticated attacker to use traversal, absolute paths, or an unbounded path_index to read image-decodable files and enumerate host paths.
Original NVD description (English source)
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 scripting in the ComfyUI origin. This issue is fixed in version 0.28.0.