Low 3.3Published Mar 7, 2026

CVE-2026-3663xlnt-community xlnt XLSX File compound_document.cpp xsgetn out-of-bounds

Updated under an hour ago (Oct 26, 2026, 9:10 AM ET)

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It affects xlnt-community xlnt and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for xlnt-community xlnt

Exploited in the last 30 days

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: 3.3 LOW (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
Weakness (CWE): CWE-125, CWE-119
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Analyzed
Record last updated: Mar 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

xlnt-community xlnt xlnt_community:xlnt (from the name)	1.6.0; 1.6.1	CNA record
xlnt-community xlnt xlnt-community:xlnt	through 1.6.1	NVD

References

https://vuldb.com/?id.349552vdb-entry, technical-description, third-party-advisory
https://vuldb.com/?ctiid.349552signature, permissions-required, vdb-entry
https://vuldb.com/?submit.764644third-party-advisory, vdb-entry
https://github.com/xlnt-community/xlnt/issues/139issue-tracking, exploit, vendor-advisory
https://github.com/oneafter/0128/blob/main/xl3/reproexploit
https://github.com/xlnt-community/xlnt/pull/147issue-tracking, patch
https://github.com/xlnt-community/xlnt/product

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.