Open WebUI's Insecure Direct Object Reference (IDOR) allows access to other users' memories

Exploitation

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

CVSS

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

EPSS

• CVE-2026-29071: 0.26% estimated exploitation activity in the next 30 days; percentile 18.17 (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 Any authenticated user can read other users' private memories via /api/v1/retrieval/query/collection Details Vulnerability 1: Missing authorization in collection querying In backend/openwebui/routers/retrieval.py, the querycollectionhandler function accepts a list of collectionnames but performs no ownership validation: Collection names follow predictable patterns: - User files: file-{FILEUUID} - User memories: user-memory-{USERUUID} (requires Memory experimental feature) PoC Environment: Open WebUI v0.8.3, default configuration. Setup: 1. Register two users: admin (first user) and attacker (second user). 2. As admin, upload a PDF document through chat. 3. As admin, enable Memory (Settings → Personalization → Memory) and add some memories. Exploitation — Step 1: Enumerate all users Response reveals all users including admin's UUID, email, and role: <img width="1340" height="731" alt="1poc - users"…

Published by the source

27 Mar 2026, 15:35 UTC

Last modified by the source

13 Jul 2026, 16:42 UTC

Source last checked

26 Oct 2026, 13:37 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-w9f8-gxf9-rhvw

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-w9f8-gxf9-rhvw

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# Patch Next advisory brief: CVE-2026-29071

Advisory: Open WebUI's Insecure Direct Object Reference (IDOR) allows access to other users' memories
IDs: CVE-2026-29071, GHSA-w9f8-gxf9-rhvw
Record: https://patchnext.com/advisories/cve-2026-29071 (revision 2, source checked 26 Oct 2026, 13:37 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Low (CVSS 3.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: open-webui 0.8.6. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI open-webui: affected <= 0.8.5; fixed in 0.8.6

## 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-w9f8-gxf9-rhvw (OSV record GHSA-w9f8-gxf9-rhvw lists affected ranges: PyPI open-webui >=0 <0.8.6 (fixed))
- Verified: https://github.com/advisories/GHSA-w9f8-gxf9-rhvw (GitHub-reviewed advisory GHSA-w9f8-gxf9-rhvw lists affected ranges: PyPI open-webui >=0 <=0.8.5)

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