CVE-2026-76641 - Expat Out-of-Bounds Read via dtdCopy
Brief
CVE ID : CVE-2026-76641
Published : Aug. 20, 2026, 6:16 p. m.
- 52 minutes ago
Description : Expat through 2.
- 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.
Severity: 8.7
- HIGH
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