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Nokogiri versions before 1.19.3 contain a memory leak in the XSLT Stylesheet transform method when processing Ruby strings containing null bytes. Attackers can exploit this by passing attacker-controlled input with null bytes to transform parameters, causing heap allocations to leak and enabling denial of service against long-running processes.
The Nokogiri XSLT ( https://amonggame.org ) memory leak is a significant security concern, so tracking the affected versions and available fixes should be a priority to prevent potential denial-of-service issues.