GHSA-x3qm-p8hr-3c3h

Suggest an improvement
Source
https://github.com/advisories/GHSA-x3qm-p8hr-3c3h
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-x3qm-p8hr-3c3h/GHSA-x3qm-p8hr-3c3h.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-x3qm-p8hr-3c3h
Aliases
  • CVE-2026-45666
Published
2026-05-14T20:27:56Z
Modified
2026-05-19T16:15:15.494623383Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
Summary
Open WebUI has an Indirect Object Reference (IDOR) in user notes
Details

Summary

The API /api/v1/notes/{note_id} endpoint lacks proper authorization checks, allowing authenticated users to retrieve notes belonging to other users by guessing or enumerating UUIDs. This results in unauthorized disclosure of potentially sensitive or private user data.

Details

  • if notes is enabled from UI (Settings >> General >> Features >> Notes (Beta))
    • From API, attacker can access other user notes
  • if notes is disabled from UI (Settings >> General >> Features >> Notes (Beta))
    • Then attacker can enable the notes from /api/config and access other user notes

PoC

  • Step 1: Log in to the application as a valid user (User A). image

  • Step 2: Intercept or inspect the response from the endpoint GET /api/config. image

  • Step 3: Observe the field "enable_notes": false in the JSON response.

  • Step 4: Manually change "enable_notes" to true using browser DevTools or by intercepting and modifying the response via a proxy like Burp Suite. (Please note, the occurrence of this API comes twice, hence modification needs to be made twice as well.) image

  • Step 5: Observe the loaded frontend application; the previously hidden notes form will now be visible. image

image

  • Step 6: Again, click on any note, intercept the request, and Replace the note_id in the URL with a different note ID known to belong to another user (e.g., by guessing or bruteforcing).
  • Step 7: Send the modified request while remaining logged in as User A.
  • Step 8: Observe that the server returns the content of another user's note, confirming unauthorized access. image image

Impact

  1. Unauthorized access to user-created notes
  2. Possible exposure of confidential or sensitive uploaded data
  3. Violation of user privacy and data isolation
  4. High risk of legal or compliance breaches in regulated environments

Resolution

Fixed in commit de3317e26, first released in v0.8.11 (Mar 2026). All per-id note endpoints (GET /api/v1/notes/{id}, POST /api/v1/notes/{id}/update, POST /api/v1/notes/{id}/access/update, deletion) now enforce ownership: the handler fetches the note, then requires the caller to be admin, the note owner, or have an AccessGrants grant for the appropriate permission (read for retrieval, write for mutation). A non-owner with no grant receives 403.

Users on >= 0.8.11 are not affected.

Database specific 
{
    "github_reviewed": true,
    "severity": "MODERATE",
    "nvd_published_at": "2026-05-15T22:16:56Z",
    "github_reviewed_at": "2026-05-14T20:27:56Z",
    "cwe_ids": [
        "CWE-639"
    ]
}
References

Affected packages

PyPI / open-webui

Package

Name
open-webui
View open source insights on deps.dev
Purl
pkg:pypi/open-webui

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.8.11

Affected versions

0.*
0.1.124
0.1.125
0.2.0
0.2.1
0.2.2
0.2.3
0.2.4
0.2.5
0.3.0
0.3.1
0.3.2
0.3.3
0.3.4
0.3.5
0.3.6
0.3.7
0.3.8
0.3.9
0.3.10
0.3.12
0.3.13
0.3.14
0.3.15
0.3.16
0.3.17.dev2
0.3.17.dev3
0.3.17.dev4
0.3.17.dev5
0.3.17
0.3.18
0.3.19
0.3.20
0.3.21
0.3.22
0.3.23
0.3.24
0.3.25
0.3.26
0.3.27.dev1
0.3.27.dev2
0.3.27.dev3
0.3.27
0.3.28
0.3.29
0.3.30.dev1
0.3.30.dev2
0.3.30
0.3.31.dev1
0.3.31
0.3.32
0.3.33.dev1
0.3.33
0.3.34
0.3.35
0.4.0.dev1
0.4.0.dev2
0.4.0
0.4.1
0.4.2
0.4.3
0.4.4
0.4.5
0.4.6.dev1
0.4.6
0.4.7
0.4.8
0.5.0.dev1
0.5.0.dev2
0.5.0
0.5.1
0.5.2
0.5.3.dev1
0.5.3
0.5.4
0.5.5
0.5.6
0.5.7
0.5.8
0.5.9
0.5.10
0.5.11
0.5.12
0.5.13
0.5.14
0.5.15
0.5.16
0.5.17
0.5.18
0.5.19
0.5.20
0.6.0
0.6.1
0.6.2
0.6.3
0.6.4
0.6.5
0.6.6.dev1
0.6.6
0.6.7
0.6.8
0.6.9
0.6.10
0.6.11
0.6.12
0.6.13
0.6.14
0.6.15
0.6.16
0.6.18
0.6.19
0.6.20
0.6.21
0.6.22
0.6.23
0.6.24
0.6.25
0.6.26.dev1
0.6.26
0.6.27
0.6.28
0.6.29
0.6.30
0.6.31
0.6.32
0.6.33
0.6.34
0.6.35
0.6.36
0.6.37
0.6.38
0.6.39
0.6.40
0.6.41
0.6.42
0.6.43
0.7.0
0.7.1
0.7.2
0.8.0
0.8.1
0.8.2
0.8.3
0.8.4
0.8.5
0.8.6
0.8.7
0.8.8
0.8.9
0.8.10

Database specific

last_known_affected_version_range 
"<= 0.8.10"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-x3qm-p8hr-3c3h/GHSA-x3qm-p8hr-3c3h.json"