XML::Parser versions through 2.45 for Perl could overflow the pre-allocated buffer size cause a heap corruption (double free or corruption) and crashes
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.8epss 0.6%
exploitation probability
0.6%top 54% of all CVEs
observed exploitation
nono source reports it
XML::Parser versions through 2.45 for Perl could overflow the pre-allocated buffer size cause a heap corruption (double free or corruption) and crashes.
A :utf8 PerlIO layer, parse_stream() in Expat.xs could overflow the XML input buffer because Perl's read() returns decoded characters while SvPV() gives back multi-byte UTF-8 bytes that can exceed the pre-allocated buffer size. This can cause heap corruption (double free or corruption) and crashes.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
TODDR · XML::ParserReferences
https://github.com/cpan-authors/XML-Parser/commit/56b0509dfc6b559cd7555ea81ee62e3622069255.patchhttps://github.com/cpan-authors/XML-Parser/issues/64https://metacpan.org/release/TODDR/XML-Parser-2.46/changeshttps://rt.cpan.org/Ticket/Display.html?id=19859http://www.openwall.com/lists/oss-security/2026/03/19/1http://www.openwall.com/lists/oss-security/2026/03/22/3