CVE-2026-109297
Open WebUI 0.11.0 before 0.11.4 Denial of Service via Automation Recurrence Rules
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-400 |
| Vendor | open-webui |
| Product | open-webui |
| Published | Oct 12, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
open-webui / open-webui
0.11.0 < 0.11.4
References
Credits
🔍 baeseungwon1010 🔍 Classic298