ComfyUI up to 0.13.0 userdata Endpoint app/user_manager.py getuserdata cross site scripting

Summaryinfo

A vulnerability identified as problematic has been detected in ComfyUI up to 0.13.0. Affected by this issue is the function getuserdata of the file app/user_manager.py of the component userdata Endpoint. Performing a manipulation results in cross site scripting. This vulnerability is reported as CVE-2026-6592. The attack is possible to be carried out remotely. Moreover, an exploit is present. The vendor was contacted early about this disclosure but did not respond in any way.

Detailsinfo

A vulnerability classified as problematic has been found in ComfyUI up to 0.13.0. This affects the function getuserdata of the file app/user_manager.py of the component userdata Endpoint. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity.

It is possible to read the advisory at gist.github.com. This vulnerability is uniquely identified as CVE-2026-6592. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. Technical details and a public exploit are known. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

The exploit is shared for download at gist.github.com. It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-23737). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

• ComfyUI

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13.0

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Submitinfo

Accepted

• Submit #791113: comfyanonymous ComfyUI <= 0.13.0 (commit 88e63705) Cross-Site Scripting (CWE-79) (by Eric-c)

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion