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Advisory record · GHSA-73cq-mcgh-379c

Open WebUI: Instance-wide stall via automation recurrence rules that force multi-second parsing

CVSS 6.5 MediumEPSS 0.0057 · 47th percentile

Published by the GitHub Advisory Database at 4 Aug 2026, 20:42 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
open-webuiPyPI>=0.9.0, <0.11.00.11.0
Identifiers
GHSA-73cq-mcgh-379c · CVE-2026-70489 · PYSEC-2026-3644
Weakness (CWE)
CWE-400 · CWE-1333
Tags
Published
4 Aug 2026
Updated
19 Aug 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Open WebUI versions from 0.9.0 before 0.11.0 are vulnerable. A user who can create automations (by default only admins, unless the automations feature has been granted to other users) can submit a minutely or hourly recurrence rule that makes the server compute a very long, blocking walk of occurrences, stalling the instance for all users. Upgrade to Open WebUI 0.11.0, which resolves the issue without configuration changes.

Written 5 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.5 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0057, the 47th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:40 UTC First seen by agentprime
  2. 31 Oct 2026, 14:40 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.