{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-59220", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-07-02T21:05:02.925Z", "datePublished": "2026-07-09T16:09:41.127Z", "dateUpdated": "2026-07-09T16:09:41.127Z"}, "containers": {"cna": {"title": "Open WebUI: ReDoS in skill-mention regexes causes whole-instance DoS on default config", "problemTypes": [{"descriptions": [{"cweId": "CWE-1333", "lang": "en", "description": "CWE-1333: Inefficient Regular Expression Complexity", "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-ffpj-xv5c-p3gw", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-ffpj-xv5c-p3gw"}, {"name": "https://github.com/open-webui/open-webui/commit/61a26722155ec6ee1b629cf8dfcf975098c18331", "tags": ["x_refsource_MISC"], "url": "https://github.com/open-webui/open-webui/commit/61a26722155ec6ee1b629cf8dfcf975098c18331"}, {"name": "https://github.com/open-webui/open-webui/releases/tag/v0.10.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/open-webui/open-webui/releases/tag/v0.10.0"}], "affected": [{"vendor": "open-webui", "product": "open-webui", "versions": [{"version": ">= 0.9.2, < 0.10.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-09T16:09:41.127Z"}, "descriptions": [{"lang": "en", "value": "Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.2 before 0.10.0, the SKILL_MENTION_RE and strip_re regular expressions in backend/open_webui/utils/middleware.py parsed <$skillId|label> skill mentions with overlapping quantifiers, allowing an authenticated chat message containing <$ without a closing > to trigger quadratic backtracking and block the asyncio event loop. This issue is fixed in version 0.10.0."}], "source": {"advisory": "GHSA-ffpj-xv5c-p3gw", "discovery": "UNKNOWN"}}}}

{}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0.9.2,0.10.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "open-webui", "source": "cna", "vendor": "open-webui"}, "product": "open-webui", "vendor": "open-webui"}], "created": "2026-07-09T17:30:17.302000+00:00", "updated": "2026-07-09T17:30:17.302031+00:00", "vendors": ["open-webui", "open-webui$PRODUCT$open-webui"]}