All vulnerabilities
CVE-2026-109295GHSA-gfjp-5hc9-852r

open-webui: Open WebUI 0.11.0 before 0.11.4 ReDoS via grep_knowledge_files Event Loop

open-webui open-webui
Open in ThreatlineRecord JSON
CVSS
5.3Medium
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)0.31%Chance of exploitation activity in the next 30 days, higher than 22% 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 from 0.11.0 before 0.11.4 contains a regular expression denial of service vulnerability that allows authenticated users to stall server workers via file search patterns. Attackers can instruct the model to call grep_knowledge_files or grep_chat_files with a catastrophically backtracking regex, blocking the event loop for two seconds per repeated call.

Text from CVE List

Affected versions 2

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

References 2