All vulnerabilities
CVE-2026-109298GHSA-gww9-mhgj-pfqh

open-webui: Open WebUI 0.11.0 before 0.11.4 Memory Exhaustion via Knowledge Search Regex

open-webui open-webui
Open in ThreatlineRecord JSON
CVSS
7.1High
ExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 13 Oct 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.39%Chance of exploitation activity in the next 30 days, higher than 32% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in0.11.4Fixed versionCVE List
Published12 Oct 2026Updated 23 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

Open WebUI 0.11.0 before 0.11.4 compiles user-chosen grep patterns for its knowledge and chat file search tools with a regex engine that expands nested counted repetition unbounded at compile time and caches the result. Authenticated users can have the model call grep_knowledge_files with short nested-repetition patterns, blocking the event loop and exhausting worker memory.

Text from CVE List

Affected versions 2

  • open-webuiaffected: 0.11.0 before 0.11.4CVE List
  • open-webuiunaffected: 0.11.4CVE List

References 3