CVE-2026-3665 Details
Description
A vulnerability was identified in xlnt-community xlnt up to 1.6.1. The affected element is the function xlnt::detail::xlsx_consumer::read_office_document of the file source/detail/serialization/xlsx_consumer.cpp of the component XLSX File Parser. The manipulation leads to null pointer dereference. The attack must be carried out locally. The exploit is publicly available and might be used.
A null pointer dereference vulnerability has been identified in xlnt-Community xlnt versions through 1.6.1. The issue arises in the XLSX file parser component, specifically within the 'xlnt::detail::xlsx_consumer::read_office_document' function of 'source/detail/serialization/xlsx_consumer.cpp'. This vulnerability leads to a segmentation fault when the application attempts to process document relationships in a malformed XLSX file, causing a crash. The vulnerability must be exploited locally, and a public exploit is available.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 11, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/oneafter/0128/blob/main/xl4/repro | [email protected] | Exploit |
| https://github.com/xlnt-community/xlnt/ | [email protected] | Product |
| https://github.com/xlnt-community/xlnt/issues/140 | [email protected] | ExploitIssue TrackingVendor Advisory |
| https://vuldb.com/?ctiid.349554 | [email protected] | Permissions RequiredVDB Entry |
| https://vuldb.com/?id.349554 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/?submit.764647 | [email protected] | Third Party AdvisoryVDB Entry |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-404 | Improper Resource Shutdown or Release | [email protected] |
| CWE-476 | NULL Pointer Dereference | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| xlnt-community xlnt | <= 1.6.1 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 29, 2026 | Data Remediation | [email protected] |
| Mar 10, 2026 | Initial Analysis | [email protected] |
| Mar 7, 2026 | New CVE Received | [email protected] |