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.

CVSS v3 3.3 LOW
CVSS v2.0 1.7 LOW

3.3^/10

CVSS v3 : LOW

Vector :

Exploitability : 1.8 / Impact : 1.4

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

1.7^/10

CVSS v2.0 : LOW

Vector : AV:L/AC:L/Au:S/C:N/I:N/A:P

Exploitability : 3.1 / Impact : 2.9

Access Vector LOCAL

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://github.com/oneafter/0128/blob/main/xl2/repro	Exploit
https://github.com/xlnt-community/xlnt/	Product
https://github.com/xlnt-community/xlnt/issues/138	Exploit Issue Tracking Vendor Advisory
https://github.com/xlnt-community/xlnt/issues/138#issuecomment-3868381672	Issue Tracking
https://github.com/xlnt-community/xlnt/pull/147	Issue Tracking
https://vuldb.com/?ctiid.348530	Permissions Required VDB Entry
https://vuldb.com/?id.348530	Third Party Advisory VDB Entry
https://vuldb.com/?submit.764643	Third Party Advisory VDB Entry

Configurations

Configuration 1 (hide)

cpe:2.3:a:xlnt-community:xlnt:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-03 12:16

Updated : 2026-03-10 20:29

NVD link : CVE-2026-3463

Mitre link : CVE-2026-3463

CVE.ORG link : CVE-2026-3463

JSON object : View

Products Affected

xlnt-community

xlnt

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-122

Heap-based Buffer Overflow

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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."}, {"lang": "es", "value": "Se ha identificado una debilidad en xlnt-community xlnt hasta 1.6.1. La funci\u00f3n xlnt::detail::binary_writer::append del archivo source/detail/binary.hpp del componente Analizador de Documentos Compuestos se ve afectada. Esta manipulaci\u00f3n causa desbordamiento de b\u00fafer basado en mont\u00edculo. El ataque solo puede ejecutarse localmente. El exploit se ha puesto a disposici\u00f3n del p\u00fablico y podr\u00eda usarse para ataques. Nombre del parche: 147. Se sugiere instalar un parche para abordar este problema."}], "lastModified": "2026-03-10T20:29:01.577", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:xlnt-community:xlnt:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9B381094-639E-4E21-8CB0-60C480F02400", "versionEndIncluding": "1.6.1"}], "operator": "OR"}]}], "sourceIdentifier": "cna@vuldb.com"}