CVE-2026-34225 — open-webui
MEDIUMCVE-2026-34225 is a medium-severity (CVSS 4.3) Server-Side Request Forgery (SSRF) vulnerability in open-webui. No vendor fix is recorded yet; mitigation options are listed below.
Open WebUI has Blind Server Side Request Forgery in its Image Edit Functionality
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
Exploitation and automatability from CISA’s SSVC triage for CVE-2026-34225.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2026-34225 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.
Where this sits among everything scored
Of 382,621 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.
Real-World Exposure
open-webuiReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.
Description
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/open_webui/routers/images.py#L850-L916
Line 911 shows the user provided URL passed to the function load_url_image. 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 '{"form_data":{
"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.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | open-webui | all versions | No fix |
Affected Products
open webuiopenwebuiDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for open-webui, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Remediation status
No patched version of open-webui has shipped for CVE-2026-34225 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
Mitigate without a patch
Restrict outbound requests from the affected component to an allowlist of hosts, block access to link-local and internal address ranges at the network layer, and require authentication on internal services so a forged request cannot reach them unauthenticated.
Frequently Asked Questions
Is CVE-2026-34225 in your dependencies?
Find it across PyPI, including transitive dependencies.