Excelize: Panic in cellInRange on a worksheet with an empty mergeCell ref

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-107220
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-07 19:17:34 UTC
Updated2026-10-07 19:17:34 UTC
DescriptionExcelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.7.1 to 2.11.0, mergeCellsParser leaves the cached rectangle empty for an empty mergeCell ref and then passes that empty slice to cellInRange without a length check. GetCellValue reaches mergeCellsParser, which passes an empty rectangle derived from the mergeCell ref attribute into cellInRange. When a crafted worksheet contains an empty mergeCell ref and a non-streaming cell API reads the worksheet, cellInRange indexes four positions in an empty slice, allowing an attacker to panic on the first affected cell operation. No fixed version is available as of this review.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Problem Types: CWE-125 | CWE-129 | CWE-125 CWE-125: Out-of-bounds Read | CWE-129 CWE-129: Improper Validation of Array Index

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
3.1CNADECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Qax-os Excelize affected >= 2.7.1, <= 2.11.0 Not specified

References

ReferenceSourceLinkTags
github.com/qax-os/excelize/security/advisories/GHSA-g27h-8qhm-6pff [email protected] github.com
github.com/qax-os/excelize/commit/99903a3240e58a47ff28fb8e05a03bd9d496ec24 [email protected] github.com
github.com/qax-os/excelize/pull/2379 [email protected] github.com
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