CVE-2026-3663

Description

A vulnerability was found in xlnt-community xlnt up to 1.6.1. This issue affects the function xlnt::detail::compound_document_istreambuf::xsgetn of the file source/detail/cryptography/compound_document.cpp of the component XLSX File Parser. Performing a manipulation results in out-of-bounds read. The attack is only possible with local access. The exploit has been made public and could be used. The patch is named 147. It is recommended to apply a patch to fix this issue.

References

https://vuldb.com/?submit.764644

https://vuldb.com/?id.349552

https://vuldb.com/?ctiid.349552

https://github.com/xlnt-community/xlnt/pull/147

https://github.com/xlnt-community/xlnt/issues/139

https://github.com/xlnt-community/xlnt/

https://github.com/oneafter/0128/blob/main/xl3/repro

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4