CVE-2026-70481

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.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/open-webui/open-webui/commit/c609ec41154fa092fa0af80d9d365de06b666286
https://github.com/open-webui/open-webui/pull/27197
https://github.com/open-webui/open-webui/releases/tag/v0.11.0
https://github.com/open-webui/open-webui/security/advisories/GHSA-mj5r-jf49-m3w7

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-04 20:16

Updated : 2026-09-08 20:41

NVD link : CVE-2026-70481

Mitre link : CVE-2026-70481

CVE.ORG link : CVE-2026-70481

JSON object : View

Products Affected

No product.

CWE

CWE-284

Improper Access Control

CWE-862

Missing Authorization

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