/ 
XML-LibXML-2.0210
/ XML::LibXML::Number
Security Advisories (1)
CVE-2026-8177 (2026-05-10)

XML::LibXML versions through 2.0210 for Perl read out-of-bounds heap memory when parsing XML node names containing truncated UTF-8 byte sequences. A node name ending in the middle of a multi byte UTF-8 sequence causes the parser to read past the end of the input string into adjacent heap memory. Any Perl process that passes attacker controlled strings to XML::LibXML's DOM node-name methods can reach this path on the default API. The likely consequence is a crash, causing denial of service.

NAME

XML::LibXML::Number - Simple numeric values.

DESCRIPTION

This class holds simple numeric values. It doesn't support -0, +/- Infinity, or NaN, as the XPath spec says it should, but I'm not hurting anyone I don't think.

API

new($num)

Creates a new XML::LibXML::Number object, with the value in $num. Does some rudimentary numeric checking on $num to ensure it actually is a number.

value()

Also as overloaded stringification. Returns the numeric value held.