CVE-2026-109299 (GCVE-0-2026-109299)
Vulnerability from cvelistv5 – Published: 2026-10-12 16:04 – Updated: 2026-10-13 16:55
VLAI
EPSS
VEX
Title
Open WebUI 0.9.0 before 0.11.4 Denial of Service via Recurrence Rule Validation
Summary
Open WebUI from 0.9.0 before 0.11.4 contains a denial of service vulnerability that allows authenticated users with automations permission to stall the instance by submitting unsatisfiable recurrence rules. Attackers can repeatedly send rules like February 30th to the automations create or update endpoints, blocking the shared event loop for seconds per request.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-13 15:49 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/open-webui/open-webui/security… | vendor-advisory |
| https://github.com/open-webui/open-webui/commit/5… | patch |
| https://www.vulncheck.com/advisories/open-webui-0… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| open-webui | open-webui |
Affected:
0.9.0 , < 0.11.4
(semver)
Unaffected: 0.11.4 (semver) cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:* |
Date Public
2026-09-27 00:00
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| Author | Source | Type | Date | Other |
|---|
Nomenclature
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