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    "cveMetadata": {
        "cveId": "CVE-2026-109298",
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "state": "PUBLISHED",
        "assignerShortName": "VulnCheck",
        "dateReserved": "2026-10-12T14:13:39.026Z",
        "datePublished": "2026-10-12T16:04:56.895Z",
        "dateUpdated": "2026-10-12T16:04:56.895Z"
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                "dateUpdated": "2026-10-12T16:04:56.895Z"
            },
            "datePublic": "2026-09-27T00:00:00.000Z",
            "title": "Open WebUI 0.11.0 before 0.11.4 Memory Exhaustion via Knowledge Search Regex",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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."
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "Uncontrolled Resource Consumption",
                            "cweId": "CWE-400",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "open-webui",
                    "product": "open-webui",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:pypi/open-webui",
                    "versions": [
                        {
                            "version": "0.11.0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "0.11.4"
                        },
                        {
                            "version": "0.11.4",
                            "status": "unaffected",
                            "versionType": "semver"
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                                    "versionEndExcluding": "0.11.4"
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                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "HIGH",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
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                        "userInteraction": "NONE",
                        "scope": "UNCHANGED",
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                        "baseSeverity": "MEDIUM"
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            ],
            "references": [
                {
                    "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-gww9-mhgj-pfqh",
                    "tags": [
                        "vendor-advisory"
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                }
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                {
                    "lang": "en",
                    "value": "baeseungwon1010",
                    "type": "reporter"
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                    "value": "Classic298",
                    "type": "finder"
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}