CVE-2026-44571

MEDIUM 6.5EPSS 0.3%

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.6, in standard channels (i.e., channels whose channel.type is neither group nor dm), the endpoint POST /api/v1/channels/{channel_id}/messages/{message_id}/update can be accessed with read permission only. When access_control is set to None, the authorization check has_access(..., type="read") evaluates to True, allowing users who are not the message owner to update messages. As a result, unauthorized modification of other users’ messages is possible. This vulnerability is fixed in 0.8.6.

CVSS v3.1: 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CVSS v3.1: 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
EPSS: 0.28% chance of exploitation in the next 30 days, 20th percentile
Published: 2026-05-15

Proof-of-concept exploits (1)

advisories/GHSA-jgj3-r8hr-9pjw

References

CVE Record
NVD entry

CVE-2026-44571

Proof-of-concept exploits (1)

References

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