Open WebUI: Channel members can overwrite another member's message via the chat completions endpoint

SummaryAny member of a channel who can post to it could also replace the text of a message written by a different member. The channel branch of the chat completions endpoint checked that the caller may write to the channel, and that the targeted message belongs to that channel, but never checked...

CVE-2026-45057: Insufficient Verification of Data Authenticity

matrix-sdk-ui provides GUI-centric utilities on top of matrix-rust-sdk. The message edit validation logic in the matrix-sdk-ui crate prior to 0.17.0 is missing a check: when replacing an encrypted event, the replacement event itself is not required to be encrypted. This enables a malicious...

CVE-2026-70481 Open WebUI: Any member with write access to a standard channel can edit or delete other members' messages

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.5.0 until 0.11.0, the standard channel message update and delete handlers accepted any caller holding write access on the channel without checking that the caller wrote the message. Because write access i...

CVE-2026-70481

CVE-2026-70481 affects Open WebUI prior to 0.11.0. In standard channels, the update and delete message handlers allowed any user with write access to a channel to rewrite or permanently delete other users’ messages, because the standard branch checked only write permission, not message authorship...

PT-2026-46306

Name of the Vulnerable Software and Affected Versions matrix-sdk-ui versions prior to 0.16.1 Description The message edit validation logic is missing a check when replacing an encrypted event, as the replacement event is not required to be encrypted. This allows a malicious homeserver administrat...

CVE-2026-45385

Summary (grounded): Open WebUI (self-hosted offline AI) contains an IDOR vulnerability in the update_message_by_id API for channels of type group/dm. In these paths, the code only verifies that the caller is a channel member (is_user_channel_member) and does not confirm message ownership, enablin...

PHP-Nuke SQL Injection Edit/Save Message(s) Bug

Exploit for unknown platform in category web applications =============================================== PHP-Nuke SQL Injection Edit/Save Messages Bug =============================================== !/usr/bin/perl use LWP; $log = "poskomenphpnukesavemsg.txt"; $Agent = "Mbahmubangga/1.0"; $proxy ...