CVE-2026-3664 Details
Description
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.
A segmentation fault vulnerability has been identified in the xlnt library, specifically in versions through 1.6.1. The issue arises in the function 'xlnt::detail::compound_document::read_directory' within 'source/detail/cryptography/compound_document.cpp', which is part of the Encrypted XLSX File Parser component. This vulnerability allows for an out-of-bounds read, likely caused by the parser mishandling corrupted or malicious directory entries in an encrypted XLSX file. The vulnerability is present in the OLE Compound Document format, where improperly validated indices can lead to accessing invalid memory regions, causing a crash.
A patch addressing this vulnerability has been implemented and is available in pull request #147 on the xlnt-community xlnt repository.
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
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/oneafter/0128/blob/main/xl5/repro | [email protected] | Exploit |
| https://github.com/xlnt-community/xlnt/ | [email protected] | Product |
| https://github.com/xlnt-community/xlnt/issues/141 | [email protected] | ExploitIssue TrackingVendor Advisory |
| https://github.com/xlnt-community/xlnt/pull/147 | [email protected] | Issue Tracking |
| https://vuldb.com/?ctiid.349553 | [email protected] | Permissions RequiredVDB Entry |
| https://vuldb.com/?id.349553 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/?submit.764646 | [email protected] | Third Party AdvisoryVDB Entry |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-119 | Improper Restriction of Operations within the Bounds of a Memory Buffer | [email protected] |
| CWE-125 | Out-of-bounds Read | [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] |