Is CVE-2026-44561 actively exploited?

No active exploitation of CVE-2026-44561 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-44561 be exploited remotely?

Yes. CVE-2026-44561 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-44561?

CVE-2026-44561 has a CVSS score of 5.4 (MEDIUM).

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MEDIUM

CVE-2026-44561

CWE-863Published: May 15, 2026· Updated: May 19, 2026

5.4

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:8.9th

Official Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the is_user_channel_member function checks whether a ChannelMember row exists but does not check the is_active field. When a user is deactivated from a group or DM channel (removed by the channel owner, or leaves voluntarily), their membership row persists with is_active=False and status='left'. Because the authorization check ignores this field, the deactivated user retains full read and write access to the channel via direct API calls. This vulnerability is fixed in 0.9.0.

NVD Source

Technical Analysis

CVE-2026-44561 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.