Open WebUI Vulnerable to Unauthenticated RAG Configuration Disclosure

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

5.3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS

• CVE-2026-45397: 0.75% estimated exploitation activity in the next 30 days; percentile 55.00 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

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: None — internet-facing with zero credentials CVSSv3.1 Score: 5.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N) --- Summary GET /api/v1/retrieval/ returns live RAG pipeline configuration to any unauthenticated HTTP client. No Authorization header, cookie, or API key is required. Every adjacent endpoint on the same router (/embedding, /config) is correctly guarded by getadminuser making this a targeted omission. --- Root Cause backend/openwebui/routers/retrieval.py:262 Compare with every adjacent endpoint on the same router: --- Proof Of Concept — No Token Required --- Disclosed Information and Its Value to an Attacker | Field | What it reveals | |---|---| | RAGEMBEDDINGENGINE | Backend type…

Published by the source

14 May 2026, 20:26 UTC

Last modified by the source

13 Jul 2026, 16:42 UTC

Source last checked

26 Oct 2026, 13:41 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-65pg-qhhw-mxwg

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-65pg-qhhw-mxwg

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# Patch Next advisory brief: CVE-2026-45397

Advisory: Open WebUI Vulnerable to Unauthenticated RAG Configuration Disclosure
IDs: CVE-2026-45397, GHSA-65pg-qhhw-mxwg
Record: https://patchnext.com/advisories/cve-2026-45397 (revision 2, source checked 26 Oct 2026, 13:41 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: open-webui 0.9.5. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI open-webui: affected < 0.9.5; fixed in 0.9.5

## Suggested inspection (read-only)
- `python -m pip show open-webui`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on open-webui.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-65pg-qhhw-mxwg (OSV record GHSA-65pg-qhhw-mxwg lists affected ranges: PyPI open-webui >=0 <0.9.5 (fixed))
- Verified: https://github.com/advisories/GHSA-65pg-qhhw-mxwg (GitHub-reviewed advisory GHSA-65pg-qhhw-mxwg lists affected ranges: PyPI open-webui >=0 <0.9.5)

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