CVE-2026-109297

Open WebUI 0.11.0 before 0.11.4 contains a denial of service vulnerability in the automation recurrence-rule validator, whose sub-daily frequency guard parses rule text more strictly than the calendar library that executes it. Users permitted to create automations can submit whitespace-folded rules (or, in 0.11.0, lowercase frequencies or omitted RRULE prefixes) that expand per-second synchronously, blocking the shared event loop for minutes per request and on every scheduler poll.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/open-webui/open-webui/security/advisories/GHSA-whgc-vpjx-m3qh
https://www.vulncheck.com/advisories/open-webui-0.11.0-before-0.11.4-denial-of-service-via-automation-recurrence-rules
https://github.com/open-webui/open-webui/security/advisories/GHSA-whgc-vpjx-m3qh

Configurations

No configuration.

History

23 Oct 2026, 22:16

Type	Values Removed	Values Added
CWE		CWE-436

15 Oct 2026, 03:17

Type	Values Removed	Values Added
References	~~() https://github.com/open-webui/open-webui/security/advisories/GHSA-whgc-vpjx-m3qh -~~	() https://github.com/open-webui/open-webui/security/advisories/GHSA-whgc-vpjx-m3qh -

12 Oct 2026, 17:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-12 17:17

Updated : 2026-10-23 22:16

NVD link : CVE-2026-109297

Mitre link : CVE-2026-109297

CVE.ORG link : CVE-2026-109297

JSON object : View

Products Affected

No product.

CWE

CWE-400

Uncontrolled Resource Consumption

CWE-436

Interpretation Conflict

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