open-webui Open WebUI up to 0.11.1 OAuth information disclosure

Summaryinfo

A vulnerability was found in open-webui Open WebUI. It has been declared as problematic. This issue affects some unknown processing of the component OAuth. Such manipulation leads to information disclosure. This vulnerability is referenced as CVE-2026-109292. It is possible to launch the attack remotely. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in open-webui Open WebUI. Affected by this issue is some unknown processing of the component OAuth. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. CVE summarizes:

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 advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-109292 since 10/12/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1592.

Upgrading to version 0.11.4 eliminates this vulnerability.

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Productinfo

Vendor

• open-webui

Name

• Open WebUI

Version

• 0.1.124
• 0.3.16
• 0.5.7
• 0.5.11
• 0.6.5
• 0.6.10
• 0.6.19
• 0.6.31
• 0.6.35
• 0.6.37
• 0.6.44
• 0.7.0
• 0.8.0
• 0.8.6
• 0.8.9
• 0.8.11
• 0.8.12
• 0.9.0
• 0.9.3
• 0.9.5
• 0.9.6
• 0.10.0
• 0.11.0
• 0.11.1

CPE 2.3info

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CPE 2.2info

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