Vulnerability Details CVE-2026-107215
Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.3.1 to 2.11.0, extractPart allocates a byte slice directly from an attacker-controlled CFB directory-entry size before validating the sector chain or size domain. extractPart trusts the CFB directory entry streamSize for EncryptionInfo and EncryptedPackage allocations before validating the stream. When a crafted OLE compound file declares a negative or extremely large EncryptionInfo or EncryptedPackage stream size, the declared size reaches make with a negative length or forces a multi-gigabyte allocation, allowing an attacker to panic or exhaust process memory. No fixed version is available as of this review.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 12.0%
CVSS Severity
CVSS v3 Score 7.5
References
Products affected by CVE-2026-107215
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cpe:2.3:a:excelize:excelize:2.10.0
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cpe:2.3:a:excelize:excelize:2.10.1
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cpe:2.3:a:excelize:excelize:2.11.0
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cpe:2.3:a:excelize:excelize:2.3.1
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cpe:2.3:a:excelize:excelize:2.3.2
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cpe:2.3:a:excelize:excelize:2.4.0
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cpe:2.3:a:excelize:excelize:2.4.1
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cpe:2.3:a:excelize:excelize:2.5.0
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cpe:2.3:a:excelize:excelize:2.6.0
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cpe:2.3:a:excelize:excelize:2.6.1
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cpe:2.3:a:excelize:excelize:2.7.0
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cpe:2.3:a:excelize:excelize:2.7.1
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cpe:2.3:a:excelize:excelize:2.8.0
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cpe:2.3:a:excelize:excelize:2.8.1
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cpe:2.3:a:excelize:excelize:2.9.0
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cpe:2.3:a:excelize:excelize:2.9.1