Vulnerability Details CVE-2026-3463
A weakness has been identified in xlnt-community xlnt up to 1.6.1. Impacted is the function xlnt::detail::binary_writer::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 locally. The exploit has been made available to the public and could be used for attacks. Patch name: 147. It is suggested to install a patch to address this issue.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 2.6%
CVSS Severity
CVSS v3 Score 3.3
CVSS v2 Score 1.7
References
- https://github.com/oneafter/0128/blob/main/xl2/repro
- https://github.com/xlnt-community/xlnt/
- https://github.com/xlnt-community/xlnt/issues/138
- https://github.com/xlnt-community/xlnt/issues/138#issuecomment-3868381672
- https://github.com/xlnt-community/xlnt/pull/147
- https://vuldb.com/?ctiid.348530
- https://vuldb.com/?id.348530
- https://vuldb.com/?submit.764643