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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "libexpat", "vendor": "libexpat project", "versions": [{"lessThan": "2.8.4", "status": "affected", "version": "2.8.2", "versionType": "semver"}]}], "source": "cve@mitre.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In libexpat 2.8.2 and 2.8.3 before 2.8.4, misinterpretation of getentropy's return code leads to insufficient entropy, which results in being vulnerable to hash flooding attacks, causing a denial of service via crafted XML content."}], "id": "CVE-2026-76956", "lastModified": "2026-08-20T05:16:29.610", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "cve@mitre.org", "type": "Secondary"}]}, "published": "2026-08-20T05:16:29.610", "references": [{"source": "cve@mitre.org", "url": "https://github.com/libexpat/libexpat/pull/1326"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-394"}], "source": "cve@mitre.org", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.8.2,2.8.4)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "libexpat", "source": "cna", "vendor": "libexpat project"}, "product": "libexpat", "vendor": "libexpat_project"}], "created": "2026-08-20T05:15:04.104850+00:00", "title": "Insufficient Entropy in libexpat Enables Hash Flooding Denial of Service", "updated": "2026-08-20T07:30:03.874767+00:00", "vendors": ["libexpat_project", "libexpat_project$PRODUCT$libexpat"]}