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Advisory record · GHSA-2f54-p244-32q6

Open WebUI: Any authenticated user can stall a worker via a knowledge-search pattern that backtracks catastrophically

CVSS 6.5 MediumEPSS 0.0059 · 48th percentile

Published by the GitHub Advisory Database at 4 Aug 2026, 20:56 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
open-webuiPyPI>=0.9.6, <0.11.00.11.0
Identifiers
GHSA-2f54-p244-32q6 · CVE-2026-70493 · PYSEC-2026-3637
Weakness (CWE)
CWE-1333
Tags
Published
4 Aug 2026
Updated
10 Aug 2026

Machine-written summary

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

Open WebUI versions 0.9.6 up to but not including 0.11.0 are vulnerable. Any authenticated user with the default knowledge search tool enabled can submit a crafted regex pattern and a short matching file, causing a worker to consume CPU for an unbounded time and blocking other users on that worker. Upgrade to Open WebUI 0.11.0 or later, which limits search time; no configuration change is needed.

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 0.0059, the 48th 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.