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Medium, CVSS 6.0amended

Open WebUI: /api/v1/channels/{id}/members exposes full user model including sensitive credentials

CVE-2026-59222GHSA-gh7p-78x6-jw6m

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (open-webui 0.10.0), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • PyPI open-webui

    Affected
    >= 0.7.0, < 0.10.0
    Fixed in
    0.10.0

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
6.0 · CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N · score source
EPSS
  • CVE-2026-59222: 0.46% estimated exploitation activity in the next 30 days; percentile 40.12 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Summary The channel members endpoint serializes and returns full user models for channel participants, including settings objects. A normal user in a DM can retrieve admin-only sensitive configuration such as webhook URLs and tool server key material (settings.ui.toolServers[].key), which is not available via standard user info APIs. Details The endpoint GET /api/v1/channels/{id}/members returns the full serialized user model for every member in the channel. In both the DM and non-DM code paths, the handler constructs the response with [UserModelResponse(user.modeldump(), isactive=...)] and returns it as the users list. Because UserModel (models/users.py) includes a settings object (UserSettings) and arbitrary UI configuration (settings.ui), the endpoint exposes other users' sensitive configuration to any channel participant. Practically, a regular user who participates in a DM or group can call /api/v1/channels/{id}/members and receive other members' settings, including admin-only…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 3 · amended ·

    Amended from ghsa record GHSA-gh7p-78x6-jw6m

  2. Revision 2 · amended ·

    Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

  3. Revision 1 · created ·

    Published from osv record GHSA-gh7p-78x6-jw6m

Agent brief

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# Patch Next advisory brief: CVE-2026-59222

Advisory: Open WebUI: /api/v1/channels/{id}/members exposes full user model including sensitive credentials
IDs: CVE-2026-59222, GHSA-gh7p-78x6-jw6m
Record: https://patchnext.com/advisories/cve-2026-59222 (revision 3, source checked 26 Oct 2026, 13:50 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.0)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: open-webui 0.10.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI open-webui: affected >= 0.7.0, < 0.10.0; fixed in 0.10.0

## 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-gh7p-78x6-jw6m (OSV record GHSA-gh7p-78x6-jw6m lists affected ranges: PyPI open-webui >=0.7.0 <0.10.0 (fixed))
- Verified: https://github.com/advisories/GHSA-gh7p-78x6-jw6m (GitHub-reviewed advisory GHSA-gh7p-78x6-jw6m lists affected ranges: PyPI open-webui >=0.7.0 <0.10.0)

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