{"data":{"id":"edee0234-ebbb-4edf-b1f5-9b19f9fcae2e","title":"GHSA-836r-79rf-4m37: Soup Sieve: Regular Expression Denial of Service (ReDoS) via Selector Parser","summary":"The soupsieve library (a CSS selector engine used by Beautiful Soup 4) contains a ReDoS vulnerability (regular expression denial of service, where a maliciously crafted input causes the regex engine to hang by repeatedly backtracking). When the CSS parser encounters an unterminated quoted attribute selector like `[a=\"xxxx...`, the regex pattern enters catastrophic backtracking, and just 300 bytes of input can cause the parser to hang for over 3 seconds, freezing any application that uses soupsieve.compile() or Beautiful Soup's .select() methods with untrusted input.","solution":"N/A -- no mitigation discussed in source.","labels":["security"],"sourceUrl":"https://github.com/advisories/GHSA-836r-79rf-4m37","publishedAt":"2026-07-09T13:37:46.000Z","cveId":"CVE-2026-49477","cweIds":null,"cvssScore":null,"cvssSeverity":"high","severity":"high","attackType":["denial_of_service"],"issueType":"vulnerability","affectedPackages":["soupsieve@<= 2.8.3 (fixed: 2.8.4)"],"affectedVendors":["HuggingFace"],"affectedVendorsRaw":["soupsieve","Beautiful Soup 4"],"classifierModel":"claude-haiku-4-5-20251001","classifierPromptVersion":"v3","cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":"unknown","epssScore":0,"patchAvailable":true,"disclosureDate":"2026-07-09T13:37:46.000Z","capecIds":null,"crossRefCount":0,"attackSophistication":"trivial","impactType":["availability"],"aiComponentTargeted":"framework","llmSpecific":false,"classifierConfidence":0.82,"researchCategory":null,"atlasIds":null}}