{"id":"CVE-2026-109298","revision":"6d3473a160334defa2bea4134b769de0","records":[{"revision":"6d3473a160334defa2bea4134b769de0","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-109298","aliases":[],"title":"Open WebUI 0.11.0 before 0.11.4 Memory Exhaustion via Knowledge Search Regex","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.","state":0,"publishedAt":"2026-10-12T16:04:56.895+00:00","modifiedAt":"2026-10-13T15:46:25.967+00:00","affected":[{"ecosystem":"Vendor product","name":"open-webui","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"open-webui\",\n                    \"product\": \"open-webui\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:pypi/open-webui\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0.11.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"0.11.4\"\n                        },\n                        {\n                            \"version\": \"0.11.4\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":7.1,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":6.5,"severity":"MEDIUM"}],"references":["https://github.com/open-webui/open-webui/security/advisories/GHSA-gww9-mhgj-pfqh","https://github.com/open-webui/open-webui/commit/97e013a66169c4fcd7f26ab9e41a4ff260ffd4da","https://www.vulncheck.com/advisories/open-webui-0.11.0-before-0.11.4-memory-exhaustion-via-knowledge-search-regex"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-109298","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-109298","identifiers":["CVE-2026-109298"]},"retained":false,"historicalAffected":[]}],"coverage":[]}