Is there a public PoC exploit available for CVE-2026-6590?

Yes, a public proof-of-concept exploit is available for CVE-2026-6590. Prioritise patching immediately. EPSS: 0.0%.

Comfyui CVE-2026-6590

Q: What is the CVSS score of CVE-2026-6590?

CVE-2026-6590 has a CVSS 4.0 base score of 2.1 (Low). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

EUVD-2026-23733 LOW

Path Traversal (CWE-22)

2026-04-20 VulDB

Path Traversal Comfyui

2.1

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

2.1 LOW

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

Severity Changed

Apr 29, 2026 - 01:12 NVD

MEDIUM LOW

CVSS changed

Apr 29, 2026 - 01:12 NVD

5.3 (MEDIUM) 2.1 (LOW)

PoC Detected

Apr 29, 2026 - 01:00 vuln.today

Public exploit code

CVSS changed

Apr 20, 2026 - 01:22 NVD

4.3 (MEDIUM) 5.3 (MEDIUM)

Analysis Generated

Apr 20, 2026 - 01:18 vuln.today

EUVD ID Assigned

Apr 20, 2026 - 01:15 euvd

EUVD-2026-23733

Analysis Generated

Apr 20, 2026 - 01:15 vuln.today

CVE Published

Apr 20, 2026 - 00:45 nvd

LOW 2.1

DescriptionCVE.org

A vulnerability was detected in ComfyUI up to 0.13.0. This impacts the function get_model_preview of the file app/model_manager.py of the component Model Preview Endpoint. The manipulation results in path traversal. The attack may be launched remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

AnalysisAI

Path traversal in ComfyUI up to version 0.13.0 allows authenticated remote attackers to read arbitrary files via manipulation of the get_model_preview function in the Model Preview Endpoint. An attacker with valid credentials can traverse the file system to access sensitive configuration files, model weights, or other data outside intended directories. Public exploit code is available, and the vendor has not provided a patched version despite early disclosure notification.

Technical ContextAI

ComfyUI is a node-based UI for Stable Diffusion and other generative AI models. The vulnerability resides in the app/model_manager.py file within the get_model_preview endpoint, which is designed to retrieve preview images for AI models. The root cause is CWE-22 (Improper Limitation of a Pathname to a Restricted Directory), meaning the endpoint fails to properly validate or sanitize file path parameters before using them in file system operations. An attacker can inject path traversal sequences (such as '../../../') into the model preview request to escape the intended model directory and access arbitrary files on the server. The vulnerability is classified under path traversal attacks and affects the Model Preview Endpoint specifically.

RemediationAI

No vendor-released patch has been identified at time of analysis, and the vendor did not respond to early disclosure. Immediate mitigation steps include: upgrade ComfyUI to the latest available version beyond 0.13.0 if a newer build is available from the official repository, though patch confirmation is lacking. As a compensating control, restrict network access to the ComfyUI Model Preview Endpoint using a Web Application Firewall (WAF) or reverse proxy to block requests containing path traversal sequences ('..', '/', backslashes); this prevents exploitation but may impact legitimate preview functionality if the endpoint uses relative paths for valid operations. Alternatively, implement strict input validation within the model manager to reject any model preview requests containing path traversal characters before file access. For shared or multi-tenant deployments, immediately audit file access logs for suspicious path traversal attempts and revoke credentials for accounts that may have been compromised. Monitor the official ComfyUI GitHub repository for security updates or community-maintained forks that may provide patches. Trade-off: WAF blocking may cause false positives if the application requires forward slashes in legitimate model names; coordinate with ComfyUI developers or community maintainers to clarify safe character sets.