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CVE-2026-107211: Excelize: Unchecked pivot-cache field index in extractPivotTableFields causes unrecoverable panic

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-10-07 · updated 2026-10-13
• Weakness: CWE-129

Description

Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.8.1 to 2.11.0, separately parsed pivot-table field indices are used to index the pivot-cache field-name slice without bounds checks. extractPivotTableFields uses getPivotCacheFieldsName output while processing GetPivotTables and trusts the dataField fld attribute as an index. When a crafted workbook supplies a pivot-field count mismatch or an out-of-range dataField fld value before GetPivotTables is called, the unchecked index causes a Go slice-bounds panic that escapes the library, allowing an attacker to crash the process or request worker. No fixed version is available as of this review.

Affected products

• qax-os excelize: from 2.8.1 through 2.11.0

References

• https://github.com/qax-os/excelize/commit/6258dcebc4e2a2aed985c38a08098dfd908521d1
• https://github.com/qax-os/excelize/pull/2435
• https://github.com/qax-os/excelize/security/advisories/GHSA-mx22-3794-2vpv

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