Is CVE-2026-44558 actively exploited?

No active exploitation of CVE-2026-44558 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-44558 be exploited remotely?

Yes. CVE-2026-44558 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-44558?

CVE-2026-44558 has a CVSS score of 5.4 (MEDIUM).

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MEDIUM

CVE-2026-44558

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

5.4

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 channel router does not call filter_allowed_access_grants on either create or update paths. A non-admin user who can create group channels (or who owns a channel) can submit arbitrary access grants — including public wildcard grants — and those grants are stored verbatim, bypassing the admin's permission framework. This vulnerability is fixed in 0.9.0.

NVD Source

Technical Analysis

CVE-2026-44558 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.