{"id":"CVE-2026-109297","published":"2026-10-12T17:17:23.240","lastModified":"2026-10-15T15:55:45.630","description":"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.","cvssScore":6.5,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-400"],"vendors":[],"products":[],"references":[{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-whgc-vpjx-m3qh","tags":[]},{"url":"https://www.vulncheck.com/advisories/open-webui-0.11.0-before-0.11.4-denial-of-service-via-automation-recurrence-rules","tags":[]},{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-whgc-vpjx-m3qh","tags":[]}],"exploitRefs":[{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-whgc-vpjx-m3qh","tags":[]},{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-whgc-vpjx-m3qh","tags":[]}],"hasPoc":true,"ai":null}