CVE-2026-109298 (GCVE-0-2026-109298)

Vulnerability from cvelistv5 – Published: 2026-10-12 16:04 – Updated: 2026-10-13 15:46
VLAI
Title
Open WebUI 0.11.0 before 0.11.4 Memory Exhaustion via Knowledge Search Regex
Summary
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.
Severity
7.1 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-13 15:45 UTC
CWE
  • CWE-400 - Uncontrolled Resource Consumption
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 6045 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
open-webui open-webui Affected: 0.11.0 , < 0.11.4 (semver)
Unaffected: 0.11.4 (semver)
    cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-09-27 00:00
Credits
baeseungwon1010 Classic298
Show details on NVD website
To clipboard 

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