ROOT-OS-DEBIAN-12-CVE-2026-66046 CVE-2026-66046 in expat - Patched by Root

Root has patched CVE-2026-66046 in the expat package for Root:Debian:12. Multiple fixed versions available...

EUVD-2026-63493

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 XMLExternalEntityParserCreate. A struct size mismatch between ELEMENTTYPE members causes storeAtts to read the attIndex...

BELL-CVE-2026-66046

Bulletin has no description...

CVE-2026-66046 Expat Denial of Service via storeAtts() Quadratic Complexity

Expat through 2.8.3 contains a denial of service vulnerability caused by quadratic algorithmic complexity in the storeAtts function in xmlparse.c, where processing N specified attributes with non-normalized values triggers an ON^2 linear scan of elementType-defaultAtts to determine CDATA status. ...