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CVE-2026-2703

LOW

3.3

Description

A weakness has been identified in xlnt-community xlnt up to 1.6.1. Impacted is the function xlnt::detail::decode_base64 of the file source/detail/cryptography/base64.cpp of the component Encrypted XLSX File Parser. Executing a manipulation can lead to off-by-one. The attack requires local access. The exploit has been made available to the public and could be used for attacks. This patch is called f2d7bf494e5c52706843cf7eb9892821bffb0734. Applying a patch is advised to resolve this issue.

CVE Details

CVSS v3.1 Score3.3

SeverityLOW

CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Attack VectorLOCAL

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published2/19/2026

Last Modified3/10/2026

Sourcenvd

Honeypot Sightings0

Affected Products

xlnt-community:xlnt

Weaknesses (CWE)

CWE-189CWE-193

References

https://github.com/oneafter/0128/blob/main/xl1/repro(cna@vuldb.com)

https://github.com/xlnt-community/xlnt/(cna@vuldb.com)

https://github.com/xlnt-community/xlnt/commit/f2d7bf494e5c52706843cf7eb9892821bffb0734(cna@vuldb.com)

https://github.com/xlnt-community/xlnt/issues/137(cna@vuldb.com)

https://vuldb.com/?ctiid.346649(cna@vuldb.com)

https://vuldb.com/?id.346649(cna@vuldb.com)

https://vuldb.com/?submit.754377(cna@vuldb.com)

IOC Correlations

No correlations recorded

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