CVE-2026-3463
low-risk
Published 2026-03-03
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.
Do I need to act?
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0.02% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
3
CVSS 3.3/10
Low
LOCAL
/ LOW complexity
Affected Products (1)
Xlnt
Affected Vendors
References (8)
Issue Tracking
https://github.com/xlnt-community/xlnt/pull/147
Permissions Required
https://vuldb.com/?ctiid.348530
Third Party Advisory
https://vuldb.com/?id.348530
Third Party Advisory
https://vuldb.com/?submit.764643
18
/ 100
low-risk
Severity
13/34 · Low
Exploitability
0/34 · Minimal
Exposure
5/34 · Minimal