{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-88002", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-09-09T19:19:27.406Z", "datePublished": "2026-09-09T21:40:06.412Z", "dateUpdated": "2026-09-09T21:40:06.412Z"}, "containers": {"cna": {"title": "Open WebUI: Any authenticated user can hang the server via a cyclic chat message history", "problemTypes": [{"descriptions": [{"cweId": "CWE-835", "lang": "en", "description": "CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/open-webui/open-webui/security/advisories/GHSA-jqhh-cjmq-vmv6", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-jqhh-cjmq-vmv6"}, {"name": "https://github.com/open-webui/open-webui/pull/28034", "tags": ["x_refsource_MISC"], "url": "https://github.com/open-webui/open-webui/pull/28034"}, {"name": "https://github.com/open-webui/open-webui/commit/5c79ccc9e5c9efc2bc024d8f0b9757652ece929a", "tags": ["x_refsource_MISC"], "url": "https://github.com/open-webui/open-webui/commit/5c79ccc9e5c9efc2bc024d8f0b9757652ece929a"}, {"name": "https://github.com/open-webui/open-webui/releases/tag/v0.11.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/open-webui/open-webui/releases/tag/v0.11.1"}], "affected": [{"vendor": "open-webui", "product": "open-webui", "versions": [{"version": ">= 0.5.0, < 0.11.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-09T21:40:06.412Z"}, "descriptions": [{"lang": "en", "value": "Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.5.0 until 0.11.1, the message-chain reconstruction helper in backend/open_webui/utils/misc.py advanced through a chat history by map key but tracked visited entries using each message body's optional id field. An authenticated user could store id-less messages in a parent cycle and trigger a non-terminating walk that blocked the async event loop, grew memory until termination, and remained persistent across process restarts. This issue is fixed in version 0.11.1."}], "source": {"advisory": "GHSA-jqhh-cjmq-vmv6", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "open-webui", "vendor": "open-webui", "versions": [{"status": "affected", "version": ">= 0.5.0, < 0.11.1"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.5.0 until 0.11.1, the message-chain reconstruction helper in backend/open_webui/utils/misc.py advanced through a chat history by map key but tracked visited entries using each message body's optional id field. An authenticated user could store id-less messages in a parent cycle and trigger a non-terminating walk that blocked the async event loop, grew memory until termination, and remained persistent across process restarts. This issue is fixed in version 0.11.1."}], "id": "CVE-2026-88002", "lastModified": "2026-09-09T22:18:49.080", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-09-09T22:18:49.080", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/open-webui/open-webui/commit/5c79ccc9e5c9efc2bc024d8f0b9757652ece929a"}, {"source": "security-advisories@github.com", "url": "https://github.com/open-webui/open-webui/pull/28034"}, {"source": "security-advisories@github.com", "url": "https://github.com/open-webui/open-webui/releases/tag/v0.11.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-jqhh-cjmq-vmv6"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-835"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"created": "2026-09-09T22:30:17.262757+00:00", "updated": "2026-09-09T22:30:17.262770+00:00", "vendors": []}