CVE-2026-107215High· 7.5▾ MidnightPoC availableExcelize 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 c…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 41.3 · likelihood 0 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Oct 9.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.2%
Last analysed / modified upstream
Exploit / PoC code exists
0.2% → 0.2%
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.
excelize >= 2.3.1, <= 2.11.0Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
github.com/xuri/excelize/v2 >= 2.3.1, < 2.11.1-0.20260912113515-5f636f9dcde5Patched in:
github.com/xuri/excelize/v2 2.11.1-0.20260912113515-5f636f9dcde5Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-107223High· 7.5Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets
CVE-2026-107222Medium· 6.5Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets
CVE-2026-107224Medium· 6.5Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets
CVE-2026-107225Medium· 6.5Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets
CVE-2026-107220Medium· 6.5Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets
CVE-2026-107221Medium· 6.5Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets