Vulnerability Description
A weakness has been identified in xlnt-community xlnt up to 1.6.1. Impacted is the function xlnt::detail::decode_base64 of the file source/detail/cryptography/base64.cpp of the component Encrypted XLSX File Parser. Executing a manipulation can lead to off-by-one. The attack requires local access. The exploit has been made available to the public and could be used for attacks. This patch is called f2d7bf494e5c52706843cf7eb9892821bffb0734. Applying a patch is advised to resolve 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/xl1/reproExploit
- https://github.com/xlnt-community/xlnt/Product
- https://github.com/xlnt-community/xlnt/commit/f2d7bf494e5c52706843cf7eb9892821bfPatch
- https://github.com/xlnt-community/xlnt/issues/137ExploitIssue TrackingVendor Advisory
- https://vuldb.com/?ctiid.346649Permissions RequiredVDB Entry
- https://vuldb.com/?id.346649Third Party AdvisoryVDB Entry
- https://vuldb.com/?submit.754377Third Party AdvisoryVDB Entry
FAQ
What is CVE-2026-2703?
CVE-2026-2703 is a vulnerability with a CVSS score of 3.3 (LOW). A weakness has been identified in xlnt-community xlnt up to 1.6.1. Impacted is the function xlnt::detail::decode_base64 of the file source/detail/cryptography/base64.cpp of the component Encrypted XLS...
How severe is CVE-2026-2703?
CVE-2026-2703 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-2026-2703?
Check the references section above for vendor advisories and patch information. Affected products include: Xlnt-Community Xlnt.