Vulnerability · Published Oct 12, 2026 · Assigned by VulnCheck

CVE-2026-109297Open WebUI 0.11.0 before 0.11.4 Denial of Service via Automation Recurrence Rules

Medium 6.5

In plain English

A medium-severity uncontrolled resource consumption in open-webui from open-webui. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.4%top 68.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
open-webui	open-webui	0.11.0 – before 0.11.4

Weakness: CWE-400, CWE-436 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

GitHub Security Advisory (GHSA-whgc-vpjx-m3qh) vendor-advisory
VulnCheck Advisory: Open WebUI 0.11.0 before 0.11.4 Denial of Service via Automation Recurrence Rules third-party-advisory