Open WebUI: Forged model meta.knowledge allows cross-user file read and deletion

Exploitation

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

CVSS

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

EPSS

• CVE-2026-54012: 0.33% estimated exploitation activity in the next 30 days; percentile 25.58 (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.

Summary Open WebUI lets a user who can create, update, or import workspace models store arbitrary meta.knowledge entries on their model without checking whether they own or can read the referenced files. Open WebUI then treats meta.knowledge entries of type file as an authorization source in two places: the built-in viewfile tool reads the file's extracted text, and hasaccesstofile()'s model branch authorizes the file content and file delete endpoints. A malicious model owner can therefore attach another user's file ID to their model metadata and read or delete that private file. Impact Security boundary crossed: file confidentiality and integrity. An authenticated attacker needs the workspace.models or workspace.modelsimport permission (or write access to an existing model) and a victim file ID. With those, for a file they do not own and cannot otherwise read, the attacker can: - read the file's extracted text (up to 100000 characters per viewfile call from file.data.content), -…

Published by the source

17 Jun 2026, 14:15 UTC

Last modified by the source

20 Jul 2026, 21:15 UTC

Source last checked

26 Oct 2026, 13:49 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-vjqm-6gcc-62cr

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-vjqm-6gcc-62cr

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# Patch Next advisory brief: CVE-2026-54012

Advisory: Open WebUI: Forged model meta.knowledge allows cross-user file read and deletion
IDs: CVE-2026-54012, GHSA-vjqm-6gcc-62cr
Record: https://patchnext.com/advisories/cve-2026-54012 (revision 2, source checked 26 Oct 2026, 13:49 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: open-webui 0.9.6. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI open-webui: affected <= 0.9.5; fixed in 0.9.6

## 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-vjqm-6gcc-62cr (OSV record GHSA-vjqm-6gcc-62cr lists affected ranges: PyPI open-webui >=0 <0.9.6 (fixed))
- Verified: https://github.com/advisories/GHSA-vjqm-6gcc-62cr (GitHub-reviewed advisory GHSA-vjqm-6gcc-62cr lists affected ranges: PyPI open-webui >=0 <=0.9.5)

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