CVE-2026-34225: Open WebUI has Blind Server Side Request Forgery in its Image Edit Functionality
Summary There is a blind server side request forgery in the functionality that allows editing an image via a prompt. The affected function will perform a GET request on the URL provided by the user. There is no restriction on the domain of the provided URL allowing the local address space to be interacted with. Since the SSRF is blind (the response cannot be read) impact is port scanning of the local network because it can be confirmed if the port is open based on if the GET request failed.
Details The vulnerability occurs here: https://github.com/open-webui/open-webui/blob/2b26355002064228e9b671339f8f3fb9d1fafa73/backend/openwebui/routers/images.py#L850-L916 Line 911 shows the user provided URL passed to the function loadurlimage. Within this function on line 883 HTTP/HTTPs URLs are trusted blindly and called asynchronously with requests.get.
PoC The vulnerability can be reproduced with the following curl command: curl -X POST http://localhost:3000/api/v1/images/edit \ -H "Authorization: Bearer <token>" \ -H "Content-Type: application/json" \ -d '{"formdata":{ "image": "<url>", "prompt": "poc"} }'
Impact Response differentials can be used to port scan the local network: <img width="3016" height="736" alt="image" src="https://github.com/user-attachments/assets/93b4df52-b23c-4ed7-a5fa-9cbedb30091c" /> This can be automated to iterate through the entire port range to determine open ports. If the service running on an open port can be inferred the user may be able to interact with it in a meaningful way if the service offers any state changing GET request endpoints.
Remediation Restrict provided URLs from local address space.
Other sources
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Versions 0.7.2 and below contain a Blind Server Side Request Forgery in the functionality that allows editing an image via a prompt. The affected function performs a GET request to a user-provided URL with no restriction on the domain, allowing the local address space to be accessed. Since the SSRF is blind (the response cannot be read), the primary impact is port scanning of the local network, as whether a port is open can be determined based on whether the GET request succeeds or fails. These response differentials can be automated to iterate through the entire port range and identify open ports. If the service running on an open port can be inferred, an attacker may be able to interact with it in a meaningful way, provided the service offers state-changing GET request endpoints. This issue was unresolved at the time of publication.
— MITRE
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Open WebUIto a version that resolves this vulnerability.Fixed in 0.7.2
Event History
Frequently Asked Questions
What is the severity of CVE-2026-34225?
CVE-2026-34225 is classified as a high-severity vulnerability due to its potential for exploitation via Blind Server Side Request Forgery.
How do I fix CVE-2026-34225?
To mitigate CVE-2026-34225, upgrade Open WebUI to version 0.7.3 or later, where the vulnerability has been addressed.
What is Blind Server Side Request Forgery in CVE-2026-34225?
Blind Server Side Request Forgery in CVE-2026-34225 allows an attacker to send unauthorized requests from the server without direct response.
Who is affected by CVE-2026-34225?
CVE-2026-34225 affects all users of Open WebUI versions 0.7.2 and below.
What functionality is impacted by CVE-2026-34225?
CVE-2026-34225 impacts the image edit functionality of Open WebUI, allowing exploitation through crafted image editing requests.