Vulnerability in Xlnt-Community Xlnt
CVE-2026-2703
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.
EPSS: 0.002 (11.3th 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 (Exploit, exploit)
- cna@vuldb.com (Patch, patch)
- cna@vuldb.com (Product, product)
Frequently asked questions
- What is CVE-2026-2703?
- CVE-2026-2703 is a low-severity vulnerability in Xlnt-Community Xlnt, classified under CWE-189. CVSS score: 3.3/10. Published 2026-02-19.
- How severe is CVE-2026-2703?
- Low severity. CVSS v3 base score is 3.3 out of 10.