CVE-2026-109292CWE-200information-disclosure

CVE-2026-109292

Medium · published October 12, 2026

CVSS v3.1
6.8
EPSS
0%
Percentile
24.0
In the wild
Unconfirmed
What it is

Open WebUI from 0.6.27 before 0.11.4 contains an information disclosure vulnerability that allows destination servers to obtain user session cookies by receiving the full browser cookie jar on OAuth-mode connections. Operators of OpenAI-compatible connections, OpenAPI tool servers or terminal servers can capture forwarded session cookies from routine requests and replay them to hijack accounts, including administrators.

The record
Technical detail
CVSS v3.1
6.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
CVSS v4.0
7.6 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
EPSS
0.00322 · 24.0th percentile
Weakness
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
Published
2026-10-12T21:17Z
References (6)
https://github.com/open-webui/open-webui/commit/3cda47cdb449aac970426f0929c9e5f8bb8bd807 · [email protected]https://github.com/open-webui/open-webui/commit/b71744b17823f7a3a9a64cb363e79a7164ed5b23 · [email protected]https://github.com/open-webui/open-webui/commit/f9f815c86220f809fad5ee1300c44f55dea74c79 · [email protected]https://github.com/open-webui/open-webui/security/advisories/GHSA-gqfh-jxvw-74rp · [email protected]https://www.vulncheck.com/advisories/open-webui-0.6.27-before-0.11.4-session-token-disclosure-via-oauth-mode-connections · [email protected]https://github.com/open-webui/open-webui/security/advisories/GHSA-gqfh-jxvw-74rp · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 14 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 12 OCT 16:04Z
    Open WebUI 0.6.27 before 0.11.4 Session Token Disclosure via OAuth-Mode Connections
    cvelistv5
  • 12 OCT 16:04Z
    Open WebUI 0.6.27 before 0.11.4 Session Token Disclosure via OAuth-Mode Connections
    cvelistv5