Insufficient Validation in Excelize Library for Microsoft Excel Spreadsheets

CVE-2026-107214

What is CVE-2026-107214?

The Excelize library, utilized for reading and writing Microsoft Excel files, contains a security flaw in its decryption routine that lacks adequate structural and parameter validation. When processing encrypted files, it allows attacker-controlled inputs to bypass necessary checks, which could lead to unexpected application behavior. Instead of following the documented error paths, this vulnerability can cause unrecovered runtime panics, effectively crashing the host process. As of this review, no fixes have been issued for this vulnerability, prompting urgent attention from developers.

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