CVE-2026-49477

{"id": "CVE-2026-49477", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-49477", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-21T14:49:25.096784Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "facelessuser", "product": "soupsieve", "versions": [{"status": "affected", "version": "< 2.8.4"}]}]}], "published": "2026-07-14T21:17:02.007", "references": [{"url": "https://github.com/facelessuser/soupsieve/commit/eb4397618709186c109400448c6043b728217dc3", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/facelessuser/soupsieve/releases/tag/2.8.4", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/facelessuser/soupsieve/security/advisories/GHSA-836r-79rf-4m37", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/facelessuser/soupsieve/security/advisories/GHSA-836r-79rf-4m37", "tags": ["Exploit", "Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-400"}, {"lang": "en", "value": "CWE-1333"}]}], "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."}], "lastModified": "2026-07-28T15:48:00.760", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:facelessuser:soup_sieve:*:*:*:*:*:beautiful_soup:*:*", "vulnerable": true, "matchCriteriaId": "6819C9CA-C98C-47D1-B9DE-E6C32A933427", "versionEndExcluding": "2.8.4"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}