CVE-2026-3463 xlnt-community xlnt Compound Document binary.hpp append heap-based overflow

A weakness has been identified in xlnt-community xlnt up to 1.6.1. Impacted is the function xlnt::detail::binarywriter::append of the file source/detail/binary.hpp of the component Compound Document Parser. This manipulation causes heap-based buffer overflow. The attack can only be executed...

CVE-2026-3463

CVE-2026-3463 affects xlnt-community xlnt up to 1.6.1. The vulnerability lies in xlnt::detail::binary_writer::append within source/detail/binary.hpp of the Compound Document Parser, causing a heap-based buffer overflow. Exploitation is local, and public PoCs/ exploits exist per the provided sourc...

PT-2026-22730

Name of the Vulnerable Software and Affected Versions xlnt-community xlnt versions up to 1.6.1 Description A flaw exists in xlnt-community xlnt up to version 1.6.1 related to the xlnt::detail::binary writer::append function within the source/detail/binary.hpp file of the Compound Document Parser...