Buffer overflow in Xlnt-Community Xlnt
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.
Vulnerability class: Buffer Overflow
EPSS: 0.002 (9.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Xlnt-community Xlnt — versions 1.6.0, 1.6.1
Weakness classification (CWE)
References
- cna@vuldb.com (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- cna@vuldb.com (signature, Permissions Required, permissions-required, VDB Entry)
- cna@vuldb.com (VDB Entry, Third Party Advisory, third-party-advisory)
- cna@vuldb.com (issue-tracking, Exploit, Issue Tracking, Vendor Advisory)
- cna@vuldb.com (issue-tracking, Issue Tracking)
- cna@vuldb.com (Exploit, exploit)
- cna@vuldb.com (issue-tracking, patch, Issue Tracking)
- cna@vuldb.com (Product, product)
Frequently asked questions
- What is CVE-2026-3463?
- CVE-2026-3463 is a low-severity vulnerability in Xlnt-Community Xlnt, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 3.3/10. Published 2026-03-03.
- How severe is CVE-2026-3463?
- Low severity. CVSS v3 base score is 3.3 out of 10.