CVE-2026-70481
Medium
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.
SeverityMedium
CVSS5.4
Exploit probability—
ProductOpenwebui Open Webui
PublishedAug 4, 2026
First seenAug 4, 2026
How to fix
Update
- openwebui open_webui0.11.0 or later
- open-webui0.11.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| openwebui open_webui | 0.5.0 ≤ v < 0.11.0 | 0.11.0 |
| open-webuiPyPI | 0.5.0 ≤ v < 0.11.0 | 0.11.0 |
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