CVE-2026-109298
Medium · 6.5CVSS
6.5
EPSS
0.5%
Published
Oct 12, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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