CVE-2026-3663

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.

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/xl3/repro	Exploit
https://github.com/xlnt-community/xlnt/	Product
https://github.com/xlnt-community/xlnt/issues/139	Exploit Issue Tracking Vendor Advisory
https://github.com/xlnt-community/xlnt/pull/147	Issue Tracking
https://vuldb.com/?ctiid.349552	Permissions Required VDB Entry
https://vuldb.com/?id.349552	Third Party Advisory VDB Entry
https://vuldb.com/?submit.764644	Third Party Advisory VDB Entry

Configurations

Configuration 1 (hide)

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

History

No history.

Information

Published : 2026-03-07 15:15

Updated : 2026-03-10 20:29

NVD link : CVE-2026-3663

Mitre link : CVE-2026-3663

CVE.ORG link : CVE-2026-3663

JSON object : View

Products Affected

xlnt-community

xlnt

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-125

Out-of-bounds Read

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