CVE-2026-109297
mediumOpen 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…
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:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/open-webui/open-webui/security/advisories/GHSA-whgc-vpjx-m3qh disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/open-webui-0.11.0-before-0.11.4-denial-of-service-via... disclosure@vulncheck.com
- https://github.com/open-webui/open-webui/security/advisories/GHSA-whgc-vpjx-m3qh 134c704f-9b21-4f2e-91b3-4a467353bcc0