Low 3.3Published Mar 7, 2026

CVE-2026-3664xlnt-community xlnt Encrypted XLSX File compound_document.cpp read_directory out-of-bounds

Updated under an hour ago (Oct 26, 2026, 8:50 PM 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 determined in xlnt-community xlnt up to 1.6.1. Impacted is the function xlnt::detail::compound_document::read_directory of the file source/detail/cryptography/compound_document.cpp of the component Encrypted XLSX File Parser. Executing a manipulation can lead to out-of-bounds read. The attack is restricted to local execution. The exploit has been publicly disclosed and may be utilized. This patch is called 147. Applying a patch is advised to resolve 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

References

https://vuldb.com/?id.349553	vdb-entry, technical-description, third-party-advisory
https://vuldb.com/?ctiid.349553	signature, permissions-required, vdb-entry
https://vuldb.com/?submit.764646	third-party-advisory, vdb-entry
https://github.com/xlnt-community/xlnt/issues/141	issue-tracking, exploit, vendor-advisory
https://github.com/oneafter/0128/blob/main/xl5/repro	exploit
https://github.com/xlnt-community/xlnt/pull/147	issue-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.