{"apiVersion":"1.0","identifier":"CVE-2026-76641","description":"Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trigger memory corruption by processing XML with external entity parsers created via XML_ExternalEntityParserCreate. A struct size mismatch between ELEMENT_TYPE members causes storeAtts to read the attIndex member past allocated memory boundaries, resulting in failure to normalize whitespace in non-CDATA attributes or a wild pointer dereference causing a segfault. This vulnerability was introduced by the fix for CVE-2026-66046.","publishedAt":"2026-08-20T18:16:51","lastModifiedAt":"2026-08-20T19:17:04","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-76641","cvssScore":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","epssProbability":0.00335,"riskScore":0.77,"affectedProduct":"expat","affectedVersions":"<=2.8.3","vulnerabilityType":"Library","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-76641","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-76641","en":"https://www.redsauce.net/en/cves/CVE-2026-76641","fr":"https://www.redsauce.net/fr/cves/CVE-2026-76641","pt":"https://www.redsauce.net/pt/cves/CVE-2026-76641","de":"https://www.redsauce.net/de/cves/CVE-2026-76641","sk":"https://www.redsauce.net/sk/cves/CVE-2026-76641","el":"https://www.redsauce.net/el/cves/CVE-2026-76641"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-76641"}}