Vulnerability Description
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 Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Xlnt-Community | Xlnt | <= 1.6.1 |
Related Weaknesses (CWE)
References
- https://github.com/oneafter/0128/blob/main/xl3/reproExploit
- https://github.com/xlnt-community/xlnt/Product
- https://github.com/xlnt-community/xlnt/issues/139ExploitIssue TrackingVendor Advisory
- https://github.com/xlnt-community/xlnt/pull/147Issue Tracking
- https://vuldb.com/?ctiid.349552Permissions RequiredVDB Entry
- https://vuldb.com/?id.349552Third Party AdvisoryVDB Entry
- https://vuldb.com/?submit.764644Third Party AdvisoryVDB Entry
FAQ
What is CVE-2026-3663?
CVE-2026-3663 is a vulnerability with a CVSS score of 3.3 (LOW). 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_documen...
How severe is CVE-2026-3663?
CVE-2026-3663 has been rated LOW with a CVSS base score of 3.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-3663?
Check the references section above for vendor advisories and patch information. Affected products include: Xlnt-Community Xlnt.