CVE-2026-109297 — Open WebUI 0.11.0 before 0.11.4 Denial of Service via Automation Recurrence Rules
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 str…
Published: 2026-10-12 · CVSS: 7.1 · CVSS 4.0
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.
Source: CVE Program · Revision 2bc2f154a9513fd639cf69e09a5cddfaedf57bdc