ExcelJS up to 4.4.0 Totals Row Formula Getter lib/doc/table.js injection

Summaryinfo

A vulnerability classified as critical has been found in ExcelJS up to 4.4.0. Affected by this issue is some unknown functionality of the file lib/doc/table.js of the component Totals Row Formula Getter. The manipulation leads to injection. This vulnerability is traded as CVE-2026-128348. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in ExcelJS up to 4.4.0 and classified as critical. This issue affects some unknown processing of the file lib/doc/table.js of the component Totals Row Formula Getter. The manipulation with an unknown input leads to a injection vulnerability. Using CWE to declare the problem leads to CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

ExcelJS through 4.4.0 contains a formula injection vulnerability in the totals row formula getter in lib/doc/table.js that fails to escape [, ], # and ' characters in structured reference column names. Attackers can supply column names containing ] via untrusted input like imported CSV headers to inject formulas such as HYPERLINK that exfiltrate cell values when users open and click the generated workbook.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-128348 since 11/13/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/13/2026). MITRE ATT&CK project uses the attack technique T1055 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• ExcelJS

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4.0

CPE 2.3info

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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