Open WebUI: shared-chat branch ignores access_type, allowing unauthorized file deletion

SummaryAny authenticated user can permanently delete files owned by other users via DELETE /api/v1/files/id when the target file is referenced in any shared chat. The hasaccesstofile authorization gate unconditionally grants access through its shared-chat branch. It checks neither the requesting...

PYSEC-2026-2738 Open WebUI Vulnerable to Cross-Site Request Forgery (CSRF) via Image URL Manipulation

Summary An application-wide Cross-Site Request Forgery CSRF vulnerability was found Open-WebUl's image uploading functionality. An attacker can set an image URL to a malicious endpoint, allowing them to perform actions on behalf of a victim user. Any authenticated user can exploit this...

PT-2026-59380

Summary An application-wide Cross-Site Request Forgery CSRF vulnerability was found Open-WebUl's image uploading functionality. An attacker can set an image URL to a malicious endpoint, allowing them to perform actions on behalf of a victim user. Any authenticated user can exploit this...

PT-2026-59337

Summary Any authenticated user can permanently delete files owned by other users via DELETE /api/v1/files/id when the target file is referenced in any shared chat. The has access to file authorization gate unconditionally grants access through its shared-chat branch. It checks neither the...

PT-2026-59404

Summary Open WebUI v0.9.5 lets an authenticated user attach arbitrary file id values to their own chat message without checking whether they own or can read those files. If the attacker then shares that chat and grants themselves read access, has access to file treats the victim file as accessibl...

CVE-2026-54010

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, Open WebUI lets an authenticated user attach arbitrary fileid values to their own chat message without checking whether they own or can read those files. If the attacker then shares...

EUVD-2026-38532

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, Open WebUI lets an authenticated user attach arbitrary fileid values to their own chat message without checking whether they own or can read those files. If the attacker then shares...

CVE-2026-6729

HKUDS OpenHarness prior to PR 159 remediation contains a session key derivation vulnerability that allows authenticated participants in shared chats or threads to hijack other users' sessions by exploiting a shared ohmo session key that lacks sender identity verification. Attackers can reuse...

CVE-2026-45671

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, any authenticated user can permanently delete files owned by other users via DELETE /api/v1/files/id when the target file is referenced in any shared chat. The hasaccesstofile...

CVE-2026-45671

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, any authenticated user can permanently delete files owned by other users via DELETE /api/v1/files/id when the target file is referenced in any shared chat. The hasaccesstofile...

Authorization Bypass Through User-Controlled Key

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key in the hasaccesstofile process. An attacker can permanently delete files owned by other users, as well as read or modify their contents, by leveraging access t...

GHSA-26G9-27VM-X3Q8 Open WebUI: shared-chat branch ignores access_type, allowing unauthorized file deletion

Summary Any authenticated user can permanently delete files owned by other users via DELETE /api/v1/files/id when the target file is referenced in any shared chat. The hasaccesstofile authorization gate unconditionally grants access through its shared-chat branch. It checks neither the requesting...

Open WebUI: shared-chat branch ignores access_type, allowing unauthorized file deletion

Summary Any authenticated user can permanently delete files owned by other users via DELETE /api/v1/files/id when the target file is referenced in any shared chat. The hasaccesstofile authorization gate unconditionally grants access through its shared-chat branch. It checks neither the requesting...

GHSA-J6W6-986J-2M2M Open WebUI Vulnerable to Cross-Site Request Forgery (CSRF) via Image URL Manipulation

Summary An application-wide Cross-Site Request Forgery CSRF vulnerability was found Open-WebUl's image uploading functionality. An attacker can set an image URL to a malicious endpoint, allowing them to perform actions on behalf of a victim user. Any authenticated user can exploit this...

EUVD-2026-23983

HKUDS OpenHarness prior to PR 159 remediation contains a session key derivation vulnerability that allows authenticated participants in shared chats or threads to hijack other users' sessions by exploiting a shared ohmo session key that lacks sender identity verification. Attackers can reuse...

CVE-2026-6729

HKUDS OpenHarness prior to PR 159 remediation contains a session key derivation vulnerability that allows authenticated participants in shared chats or threads to hijack other users' sessions by exploiting a shared ohmo session key that lacks sender identity verification. Attackers can reuse...

CVE-2026-6729

CVE-2026-6729 concerns HKUDS OpenHarness before PR #159, where a session key derivation flaw allows authenticated participants in shared chats/threads to hijack other users’ sessions by exploiting a shared ohmo session key without sender identity verification. This enables reuse of another user’s...

CVE-2026-6729 HKUDS OpenHarness Session Key Collision Privilege Escalation

HKUDS OpenHarness prior to PR 159 remediation contains a session key derivation vulnerability that allows authenticated participants in shared chats or threads to hijack other users' sessions by exploiting a shared ohmo session key that lacks sender identity verification. Attackers can reuse...

CVE-2026-6729 HKUDS OpenHarness Session Key Collision Privilege Escalation

HKUDS OpenHarness prior to PR 159 remediation contains a session key derivation vulnerability that allows authenticated participants in shared chats or threads to hijack other users' sessions by exploiting a shared ohmo session key that lacks sender identity verification. Attackers can reuse...

CVE-2026-6729 HKUDS OpenHarness Session Key Collision Privilege Escalation

HKUDS OpenHarness prior to PR 159 remediation contains a session key derivation vulnerability that allows authenticated participants in shared chats or threads to hijack other users' sessions by exploiting a shared ohmo session key that lacks sender identity verification. Attackers can reuse...