CVE-2026-3663CWE-119CWE-125

xlnt-community xlnt XLSX File compound_document.cpp xsgetn out-of-bounds

Medium · published March 7, 2026

CVSS v4.0
4.8
EPSS
0%
Percentile
9.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
4.8 · MEDIUM
Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
EPSS
0.00200 · 9.3th percentile
Weaknesses
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer; CWE-125 · Out-of-bounds Read
Published
2026-03-07T14:32Z
EPSS history
Timeline
  • 07 MAR 14:32Z
    xlnt-community xlnt XLSX File compound_document.cpp xsgetn out-of-bounds
    cvelistv5