CVE-2026-70481
MEDIUMOpen WebUI: Any member with write access to a standard channel can edit or delete other members' messages
Title source: cnaExploitation Summary
EIP tracks 1 public exploit for CVE-2026-70481. PoCs published by Foxer131.
AI-analyzed exploit summary This repository contains a functional exploit for CVE-2026-70481, demonstrating an authentication bypass in channel message manipulation. The PoC allows a standard user with write access to edit, delete, pin, and forge messages authored by other users in standard channels, including payload injection and history destruction.
Description
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 is the same grant a member needs to post, any ordinary participant in a shared standard channel could rewrite or permanently delete another participant message, while group and direct message handlers enforced authorship. This issue is fixed in 0.11.0.
Exploits (1)
This repository contains a functional exploit for CVE-2026-70481, demonstrating an authentication bypass in channel message manipulation. The PoC allows a standard user with write access to edit, delete, pin, and forge messages authored by other users in standard channels, including payload injection and history destruction.
References (4)
Scores
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L