CVE-2026-109298
Open WebUI 0.11.0 before 0.11.4 Memory Exhaustion via Knowledge Search Regex
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-400 |
| Vendor | open-webui |
| Product | open-webui |
| Published | Oct 12, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
open-webui / open-webui
0.11.0 < 0.11.4
References
github.com: https://github.com/open-webui/open-webui/security/advisories/GHSA-gww9-mhgj-pfqh github.com: https://github.com/open-webui/open-webui/commit/97e013a66169c4fcd7f26ab9e41a4ff260ffd4da vulncheck.com: https://www.vulncheck.com/advisories/open-webui-0.11.0-before-0.11.4-memory-exhaustion-via-knowledge-search-regex
Credits
🔍 baeseungwon1010 Classic298