{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-49477", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-30T04:17:43.095Z", "datePublished": "2026-07-14T20:51:29.369Z", "dateUpdated": "2026-07-14T20:51:29.369Z"}, "containers": {"cna": {"title": "Soup Sieve: Regular Expression Denial of Service (ReDoS) in soupsieve Selector Parser", "problemTypes": [{"descriptions": [{"cweId": "CWE-400", "lang": "en", "description": "CWE-400: Uncontrolled Resource Consumption", "type": "CWE"}]}, {"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": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/facelessuser/soupsieve/security/advisories/GHSA-836r-79rf-4m37", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/facelessuser/soupsieve/security/advisories/GHSA-836r-79rf-4m37"}, {"name": "https://github.com/facelessuser/soupsieve/commit/eb4397618709186c109400448c6043b728217dc3", "tags": ["x_refsource_MISC"], "url": "https://github.com/facelessuser/soupsieve/commit/eb4397618709186c109400448c6043b728217dc3"}, {"name": "https://github.com/facelessuser/soupsieve/releases/tag/2.8.4", "tags": ["x_refsource_MISC"], "url": "https://github.com/facelessuser/soupsieve/releases/tag/2.8.4"}], "affected": [{"vendor": "facelessuser", "product": "soupsieve", "versions": [{"version": "< 2.8.4", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-14T20:51:29.369Z"}, "descriptions": [{"lang": "en", "value": "Soup Sieve is a CSS selector library designed to be used with Beautiful Soup 4. Prior to 2.8.4, the CSS selector parser in soupsieve contains a regular expression vulnerable to catastrophic backtracking when processing an attribute selector with an unterminated quoted value in soupsieve/css_parser.py, allowing an attacker who can supply untrusted CSS selector strings to soupsieve.compile() or Beautiful Soup .select() / .select_one() to cause CPU exhaustion and denial of service. This issue is fixed in version 2.8.4."}], "source": {"advisory": "GHSA-836r-79rf-4m37", "discovery": "UNKNOWN"}}}}

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