PT-2026-110716 · Git+1 · Open-Webui

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CVE-2026-109299

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Published

2026-10-12

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Updated

2026-10-12

CVSS v4.0

7.1

High

VectorAV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Name of the Vulnerable Software and Affected Versions Open WebUI versions 0.9.0 through 0.11.3
Description Authenticated users with automations permission can cause a denial of service by submitting unsatisfiable recurrence rules. By sending invalid dates, such as February 30th, to the 'automations create' or 'automations update' endpoints, an attacker can block the shared event loop for several seconds per request, stalling the instance.
Recommendations Update Open WebUI to version 0.11.4 or later.

Exploit

Fix

Resource Exhaustion

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Weakness Enumeration

Related Identifiers

CVE-2026-109299
GHSA-5W58-MWMH-VF2M

Affected Products

Open-Webui