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CWE

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CVE-2026-3463

Published: Mar 3, 2026

Modified: Mar 3, 2026

PUBLISHED

CVSS v3.1

3.3

LOW

Description

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.

Vendor	Product	Versions
xlnt-community	xlnt	affected `1.6.0` affected `1.6.1`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

References

VDB-348530 | xlnt-community xlnt Compound Document binary.hpp append heap-based overflow

vdb-entry

technical-description

VDB-348530 | CTI Indicators (IOB, IOC, IOA)

signature

permissions-required

Submit #764643 | xlnt-community xlnt commit bceb706 and before Heap-based Buffer Overflow

third-party-advisory

https://github.com/xlnt-community/xlnt/issues/138

issue-tracking

https://github.com/xlnt-community/xlnt/issues/138#issuecomment-3868381672

issue-tracking

https://github.com/oneafter/0128/blob/main/xl2/repro

exploit

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

issue-tracking

patch

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

product

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