Open WebUI Exposes System Prompt to Regular User [Non-Admin]

SummaryA regular user non-admin can view the system prompt of the model which is set by an admin. DetailsWhen a regular user non-admin logs into the application, a http://IP:8080/api/models? web request is initiated by the application and in response, it reveals the system prompt of available...

PYSEC-2026-2756 Open WebUI: Mass Assignment via FeedbackForm extra=allow Allows Feedback User ID Spoofing and Evaluation Data Manipulation

Mass Assignment in Feedback Creation Allows User ID Spoofing and Evaluation Data Manipulation Summary The POST /api/v1/evaluations/feedback endpoint in Open WebUI v0.9.2 is vulnerable to mass assignment via FeedbackForm, which uses modelconfig = ConfigDictextra='allow'. Due to an insecure...

openwebui-token-tracking (0.1.7) potentially affected by CVE-2026-45398 via open-webui (0.6.0)

open-webui PYPI version 0.6.0 is affected by a known vulnerability. The following packages have a transitive dependency on open-webui and may be impacted: - openwebui-token-tracking 0.1.7 Source cves: CVE-2026-45398 Source advisory: OSV:PYSEC-2026-2699...

openwebui-token-tracking (0.1.7) potentially affected by CVE-2026-45387 via open-webui (0.6.0)

open-webui PYPI version 0.6.0 is affected by a known vulnerability. The following packages have a transitive dependency on open-webui and may be impacted: - openwebui-token-tracking 0.1.7 Source cves: CVE-2026-45387 Source advisory: OSV:PYSEC-2026-2728...

openwebui-token-tracking (0.1.7) potentially affected by CVE-2026-45399 via open-webui (0.6.0)

open-webui PYPI version 0.6.0 is affected by a known vulnerability. The following packages have a transitive dependency on open-webui and may be impacted: - openwebui-token-tracking 0.1.7 Source cves: CVE-2026-45399 Source advisory: OSV:PYSEC-2026-2714...

PYSEC-2026-2706 Open WebUI Vulnerable to Unauthenticated RAG Configuration Disclosure

Vulnerability Type: Information Disclosure / Missing Authentication Severity: Medium Component: backend/openwebui/routers/retrieval.py — getstatus GET / Affected Endpoint: GET /api/v1/retrieval/ Affected Version: Open WebUI main branch — confirmed unpatched through v0.9.2 Authentication Required:...

PYSEC-2026-2715 Open WebUI has a Server-Side Request Forgery (SSRF) bypass in `validate_url`

Summary In the open-webui project, a parsing difference between the urlparse and requests libraries led to an SSRF bypass vulnerability. Details In the current project, URL validation is performed using the function validateurl. The current checking logic uses urlparse to parse the hostname part ...

Open WebUI has a Server-Side Request Forgery (SSRF) bypass in `validate_url`

SummaryIn the open-webui project, a parsing difference between the urlparse and requests libraries led to an SSRF bypass vulnerability. DetailsIn the current project, URL validation is performed using the function validateurl.The current checking logic uses urlparse to parse the hostname part of...

Open WebUI Vulnerable to Unauthenticated RAG Configuration Disclosure

Vulnerability Type: Information Disclosure / Missing Authentication Severity: Medium Component: backend/openwebui/routers/retrieval.py — getstatus GET / Affected Endpoint: GET /api/v1/retrieval/ Affected Version: Open WebUI main branch — confirmed unpatched through v0.9.2 Authentication Required:...

openwebui-token-tracking (0.1.7) potentially affected by CVE-2026-45385 via open-webui (0.6.0)

open-webui PYPI version 0.6.0 is affected by a known vulnerability. The following packages have a transitive dependency on open-webui and may be impacted: - openwebui-token-tracking 0.1.7 Source cves: CVE-2026-45385 Source advisory: OSV:PYSEC-2026-2767...

openwebui-token-tracking (0.1.7) potentially affected by CVE-2026-45396 via open-webui (0.6.0)

open-webui PYPI version 0.6.0 is affected by a known vulnerability. The following packages have a transitive dependency on open-webui and may be impacted: - openwebui-token-tracking 0.1.7 Source cves: CVE-2026-45396 Source advisory: OSV:PYSEC-2026-2756...

openwebui-token-tracking (0.1.7) potentially affected by CVE-2026-45351 via open-webui (0.6.0)

open-webui PYPI version 0.6.0 is affected by a known vulnerability. The following packages have a transitive dependency on open-webui and may be impacted: - openwebui-token-tracking 0.1.7 Source cves: CVE-2026-45351 Source advisory: OSV:PYSEC-2026-2741...

PYSEC-2026-2727 Open WebUI missing authorization check at the model update function - models from other users can be updated

Summary A user can modify another user's model even if its visibility is set to Private. The finding resulted from a penetration test for a customer. It is suspected that the root cause of the issue lies within the core of Open WebUI, which is why it is being reported as a security issue here...

Open WebUI has stored XSS via attacker-controlled file extension in /api/v1/audio/transcriptions

Summary The audio transcription upload endpoint takes the file extension from the user-supplied filename and saves the file under CACHEDIR/audio/transcriptions/.. The /cache/path route serves these files via FileResponse, which sets Content-Type from the on-disk extension and emits no...

Open WebUI missing authorization check at the model update function - models from other users can be updated

SummaryA user can modify another user's model even if its visibility is set to Private.The finding resulted from a penetration test for a customer. It is suspected that the root cause of the issue lies within the core of Open WebUI, which is why it is being reported as a security issue here. Test...

Open WebUI has stored XSS via unsanitized Office/Excel/DOCX file preview rendering ({@html} without DOMPurify)

Related advisoryThis advisory tracks a regression of the original Excel-preview XSS that was publicly disclosed and patched under GHSA-jwf8-pv5p-vhmc patched in v0.8.0. The same root cause — XLSX.utils.sheettohtml output rendered via @html excelHtml without DOMPurify — was reintroduced sometime...

openwebui-token-tracking (0.1.7) potentially affected by CVE-2026-45331 via open-webui (0.6.0)

open-webui PYPI version 0.6.0 is affected by a known vulnerability. The following packages have a transitive dependency on open-webui and may be impacted: - openwebui-token-tracking 0.1.7 Source cves: CVE-2026-45331 Source advisory: OSV:PYSEC-2026-2702...

openwebui-token-tracking (0.1.7) potentially affected by CVE-2026-45317 via open-webui (0.6.0)

open-webui PYPI version 0.6.0 is affected by a known vulnerability. The following packages have a transitive dependency on open-webui and may be impacted: - openwebui-token-tracking 0.1.7 Source cves: CVE-2026-45317 Source advisory: OSV:PYSEC-2026-2738...

PYSEC-2026-2723 Open WebUI vulnerable to blind server side request forgery (SSRF) via the PDF generate function

Summary Blind server side request forgery SSRF via the PDF generate function. The finding resulted from a penetration test for a customer. It is suspected that the root cause of the issue lies within the core of Open WebUI, which is why it is being reported as a security issue here. Tested on Ope...

Open WebUI's chat completion API allows tool restrictions to be bypassed

SummaryOpen WebUI v0.6.43 contains a vulnerability in its chat completion API, which allows attackers to bypass tool restrictions, potentially enabling unauthorized actions or access. DetailsIn the chatcompletion API, the parameters toolids and toolservers are supplied by the user. These paramete...