CVE-2026-109298
Open WebUI 0.11.0 before 0.11.4 Memory Exhaustion via Knowledge Search Regex
- State
- Published
- Severity
- 7.1 High
- Published
- Oct 12, 2026
- Updated
- Oct 23, 2026
- Reserved
- Oct 12, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 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 | VulnCheck |
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
open-webuiopen-webui |
|
References
- GitHub Security Advisory (GHSA-gww9-mhgj-pfqh)vendor-advisory
- Patch Commitpatch
- VulnCheck Advisory: Open WebUI 0.11.0 before 0.11.4 Memory Exhaustion via Knowledge Search Regexthird-party-advisory
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