Is CVE-2026-44559 actively exploited?

No active exploitation of CVE-2026-44559 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-44559 be exploited remotely?

Yes. CVE-2026-44559 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-44559?

CVE-2026-44559 has a CVSS score of 4.3 (MEDIUM).

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MEDIUM

CVE-2026-44559

CWE-862Published: May 15, 2026· Updated: May 19, 2026

4.3

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:7.6th

Official Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the GET /api/v1/channels/{id}/members endpoint only checks membership for group and dm channel types (lines 467-469). For standard channels — including private ones — there is no channel_has_access check before returning the member list. Any authenticated user who knows a private channel's UUID can enumerate all users with access to that channel. This vulnerability is fixed in 0.9.0.

NVD Source

Technical Analysis

CVE-2026-44559 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.