issue: trailing slash in OPENAI_API url isn't handled safely #6146

New Issue

2025-11-11T16:46:07-06:00

GiteaMirror commented

2025-11-11 16:46:07 -06:00

Originally created by @theigel on GitHub (Aug 20, 2025).

Check Existing Issues

I have searched the existing issues and discussions.
I am using the latest version of Open WebUI.

Installation Method

Docker

Open WebUI Version

0.6.22

Ollama Version (if applicable)

Operating System

Ubuntu something

Browser (if applicable)

No response

Confirmation

I have read and followed all instructions in README.md.
I am using the latest version of both Open WebUI and Ollama.
I have included the browser console logs.
I have included the Docker container logs.
I have provided every relevant configuration, setting, and environment variable used in my setup.
I have clearly listed every relevant configuration, custom setting, environment variable, and command-line option that influences my setup (such as Docker Compose overrides, .env values, browser settings, authentication configurations, etc).
I have documented step-by-step reproduction instructions that are precise, sequential, and leave nothing to interpretation. My steps:
Start with the initial platform/version/OS and dependencies used,
Specify exact install/launch/configure commands,
List URLs visited, user input (incl. example values/emails/passwords if needed),
Describe all options and toggles enabled or changed,
Include any files or environmental changes,
Identify the expected and actual result at each stage,
Ensure any reasonably skilled user can follow and hit the same issue.

Expected Behavior

If I set up my configuration

OPENAI_API_BASE_URL: "https://api.studio.nebius.com/v1/"
OPENAI_API_KEY: "my_key"
MODEL_FILTER_LIST: '["openai/gpt-oss-120b"]'
DEFAULT_MODELS: "openai/gpt-oss-120b"

I expect everything to work (model being detected and used), but instead I get empty list of models and nothing works.

The problem is with trailing slash in "https://api.studio.nebius.com/v1/". If removed, everything works.

I would expect https://github.com/open-webui/open-webui/blob/main/backend/open_webui/routers/openai.py#L506 to be something like

async with session.get(
                        urllib.parse.urljoin(url, "models"),
                        headers=headers,

instead of

async with session.get(
                        f"{url}/models",
                        headers=headers,

Of course, the API provider (Nebius) could also remove extra slashes and process this situation successfully, but anyway.

I assume there may be other similar places in the code. I would suggest using proper URL handling everywhere.

Actual Behavior

No available models detected. Besides, not much useful information in the logs:

Steps to Reproduce

Install a new installation with such a config. No models detected; besides, no clear explanation in the logs.

Logs & Screenshots

2025-08-20 10:32:05.882 | DEBUG    | aiocache.base:get:201 - GET open_webui.routers.openaiget_all_models(<starlette.requests.Request object at 0x7f8054b2ee90>,)[('user', UserModel(id='9a846b07-6005-471c-bd31-c67a4b460756', name='theigel', email='xxxx', role='admin', profile_image_url='data:image/smth', last_active_at=1755685925, updated_at=1755683545, created_at=1755683545, api_key=None, settings=UserSettings(ui={'version': '0.6.22'}), info=None, oauth_sub=None))] False (0.0000)s
2025-08-20 10:32:05.882 | INFO     | open_webui.routers.openai:get_all_models:397 - get_all_models()
2025-08-20 10:32:05.950 | DEBUG    | open_webui.routers.openai:get_all_models_responses:378 - get_all_models:responses() [{'detail': 'Not Found'}]
2025-08-20 10:32:05.950 | DEBUG    | open_webui.routers.openai:merge_models_lists:412 - merge_models_lists <map object at 0x7f80549b6800>
2025-08-20 10:32:05.950 | DEBUG    | open_webui.routers.openai:get_all_models:451 - models: {'data': []}
2025-08-20 10:32:05.950 | DEBUG    | aiocache.base:set:280 - SET open_webui.routers.openaiget_all_models(<starlette.requests.Request object at 0x7f8054b2ee90>,)[('user', UserModel(id='9a846b07-6005-471c-bd31-c67a4b460756', name='theigel', email=xxxxxx, role='admin', profile_image_url='data:image/smth', last_active_at=1755685925, updated_at=1755683545, created_at=1755683545, api_key=None, settings=UserSettings(ui={'version': '0.6.22'}), info=None, oauth_sub=None))] 1 (0.0000)s
2025-08-20 10:32:05.951 | DEBUG    | open_webui.main:get_models:1327 - /api/models returned filtered models accessible to the user: []```

It would be great to see the requested URL in the logs, not just "Not found". And not with DEBUG, but WARN level.

### Additional Information

_No response_

Originally created by @theigel on GitHub (Aug 20, 2025). ### Check Existing Issues - [x] I have searched the existing issues and discussions. - [x] I am using the latest version of Open WebUI. ### Installation Method Docker ### Open WebUI Version 0.6.22 ### Ollama Version (if applicable) - ### Operating System Ubuntu something ### Browser (if applicable) _No response_ ### Confirmation - [x] I have read and followed all instructions in `README.md`. - [x] I am using the latest version of **both** Open WebUI and Ollama. - [x] I have included the browser console logs. - [x] I have included the Docker container logs. - [x] I have **provided every relevant configuration, setting, and environment variable used in my setup.** - [x] I have clearly **listed every relevant configuration, custom setting, environment variable, and command-line option that influences my setup** (such as Docker Compose overrides, .env values, browser settings, authentication configurations, etc). - [x] I have documented **step-by-step reproduction instructions that are precise, sequential, and leave nothing to interpretation**. My steps: - Start with the initial platform/version/OS and dependencies used, - Specify exact install/launch/configure commands, - List URLs visited, user input (incl. example values/emails/passwords if needed), - Describe all options and toggles enabled or changed, - Include any files or environmental changes, - Identify the expected and actual result at each stage, - Ensure any reasonably skilled user can follow and hit the same issue. ### Expected Behavior If I set up my configuration ``` OPENAI_API_BASE_URL: "https://api.studio.nebius.com/v1/" OPENAI_API_KEY: "my_key" MODEL_FILTER_LIST: '["openai/gpt-oss-120b"]' DEFAULT_MODELS: "openai/gpt-oss-120b" ``` I expect everything to work (model being detected and used), but instead I get empty list of models and nothing works. The problem is with trailing slash in `"https://api.studio.nebius.com/v1/"`. If removed, everything works. I would expect https://github.com/open-webui/open-webui/blob/main/backend/open_webui/routers/openai.py#L506 to be something like ``` async with session.get( urllib.parse.urljoin(url, "models"), headers=headers, ``` instead of ``` async with session.get( f"{url}/models", headers=headers, ``` Of course, the API provider (Nebius) could also remove extra slashes and process this situation successfully, but anyway. I assume there may be other similar places in the code. I would suggest using proper URL handling everywhere. ### Actual Behavior No available models detected. Besides, not much useful information in the logs: ### Steps to Reproduce Install a new installation with such a config. No models detected; besides, no clear explanation in the logs. ### Logs & Screenshots ``` 2025-08-20 10:32:05.882 | DEBUG | aiocache.base:get:201 - GET open_webui.routers.openaiget_all_models(<starlette.requests.Request object at 0x7f8054b2ee90>,)[('user', UserModel(id='9a846b07-6005-471c-bd31-c67a4b460756', name='theigel', email='xxxx', role='admin', profile_image_url='data:image/smth', last_active_at=1755685925, updated_at=1755683545, created_at=1755683545, api_key=None, settings=UserSettings(ui={'version': '0.6.22'}), info=None, oauth_sub=None))] False (0.0000)s 2025-08-20 10:32:05.882 | INFO | open_webui.routers.openai:get_all_models:397 - get_all_models() 2025-08-20 10:32:05.950 | DEBUG | open_webui.routers.openai:get_all_models_responses:378 - get_all_models:responses() [{'detail': 'Not Found'}] 2025-08-20 10:32:05.950 | DEBUG | open_webui.routers.openai:merge_models_lists:412 - merge_models_lists <map object at 0x7f80549b6800> 2025-08-20 10:32:05.950 | DEBUG | open_webui.routers.openai:get_all_models:451 - models: {'data': []} 2025-08-20 10:32:05.950 | DEBUG | aiocache.base:set:280 - SET open_webui.routers.openaiget_all_models(<starlette.requests.Request object at 0x7f8054b2ee90>,)[('user', UserModel(id='9a846b07-6005-471c-bd31-c67a4b460756', name='theigel', email=xxxxxx, role='admin', profile_image_url='data:image/smth', last_active_at=1755685925, updated_at=1755683545, created_at=1755683545, api_key=None, settings=UserSettings(ui={'version': '0.6.22'}), info=None, oauth_sub=None))] 1 (0.0000)s 2025-08-20 10:32:05.951 | DEBUG | open_webui.main:get_models:1327 - /api/models returned filtered models accessible to the user: []``` It would be great to see the requested URL in the logs, not just "Not found". And not with DEBUG, but WARN level. ### Additional Information _No response_

GiteaMirror added the bug label 2025-11-11 16:46:07 -06:00

GiteaMirror closed this issue

2025-11-11 16:46:07 -06:00

GiteaMirror commented

2025-11-11 16:46:08 -06:00