CVE-2026-59215CWE-639

Open WebUI: Private channel messages can be disclosed through cross-channel thread parent_id binding

Low · published July 9, 2026

CVSS v3.1
3.1
EPSS
0%
Percentile
24.1
In the wild
Unconfirmed
What it is

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.10.0, channel thread parent and reply handling did not bind parent_id to the channel in the URL, allowing an authenticated user to reference a message from another private or DM channel and disclose thread context across channels. This issue is fixed in version 0.10.0.

The record
Technical detail
CVSS v3.1
3.1 · LOW
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00323 · 24.1th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-07-09T16:57Z
EPSS history
Timeline
  • 09 JUL 16:57Z
    Open WebUI: Private channel messages can be disclosed through cross-channel thread parent_id binding
    cvelistv5