What is CVE-2026-56672?

CVE-2026-56672 is a high-severity vulnerability in Comfy-org Comfyui, classified under Cross-site Scripting. CVSS score: 8.2/10. Published 2026-07-31.

How severe is CVE-2026-56672?

High severity. CVSS v3 base score is 8.2 out of 10.

XSS in Comfy-org Comfyui

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…

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N.

Affected products

Comfy-org Comfyui — versions < 0.28.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-56672?: CVE-2026-56672 is a high-severity vulnerability in Comfy-org Comfyui, classified under Cross-site Scripting. CVSS score: 8.2/10. Published 2026-07-31.
How severe is CVE-2026-56672?: High severity. CVSS v3 base score is 8.2 out of 10.