CVE-2026-107225
mediumExcelize is a Go language library for reading and writing Microsoft Excel spreadsheets.
Vendor / product: Excelize — excelize
Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.8.0 to 2.11.0, GetStyle's fill, border, and font extraction predicates check only upper bounds for attacker-controlled style-table indices. File.GetStyle relies on extractStyleCondFuncs predicates that allow negative FillID, BorderID, and FontID values to reach slice indexing. When a crafted styles.xml supplies a negative fillId, borderId, or fontId and the application reads the style, a negative identifier passes the upper-bound-only predicate and becomes a negative slice index, allowing an attacker to panic while reading cell styling. No fixed version is available as of this review.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Affected products
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
References
- https://github.com/qax-os/excelize/commit/ae2113b410e51f6a141c396a59eda8c42b91bc22 security-advisories@github.com
- https://github.com/qax-os/excelize/pull/2367 security-advisories@github.com
- https://github.com/qax-os/excelize/security/advisories/GHSA-5h23-36rv-pm65 security-advisories@github.com
- https://github.com/qax-os/excelize/security/advisories/GHSA-5h23-36rv-pm65 134c704f-9b21-4f2e-91b3-4a467353bcc0