CVE-2026-56670

EUVD-2026-51400
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.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
GitHub_MCNA
8.2 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 13%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
comfycomfyui
𝑥
< 0.28.0
CNA
Common Weakness Enumeration
References
https://github.com/Comfy-Org/ComfyUI/commit/96e0e3585b41e1417442eaa14ec57f7b4ffcb5e0
https://github.com/Comfy-Org/ComfyUI/releases/tag/v0.28.0
https://github.com/Comfy-Org/ComfyUI/security/advisories/GHSA-rj8c-c4p8-3c5h