PT-2026-79802

Name of the Vulnerable Software and Affected Versions exceljs-hardened versions prior to 5.0.0 Description Insufficient neutralization of leading equals =, plus +, minus -, or at @ signs in cell values written to CSV output allows for CSV Injection. This occurs when attackers influence exported...

PT-2026-79800

Name of the Vulnerable Software and Affected Versions exceljs-hardened versions prior to 5.0.0 Description An issue exists in the deepMerge helper that fails to reject proto , constructor, or prototype keys when merging note objects. This allows attackers to assign parsed JSON containing a...

CVE-2026-78207: Improperly Controlled Modification of Object Prototype Attributes

exceljs through 4.4.0 contains a prototype pollution vulnerability in the deepMerge helper that fails to reject proto, constructor, or prototype keys when merging note objects. Attackers can assign parsed JSON with a malicious proto property to cell notes, modifying Object.prototype and affecting...

PT-2026-79799

Name of the Vulnerable Software and Affected Versions exceljs-hardened versions prior to 5.0.0 Description The software decompresses all entries from supplied xlsx archives into memory without limits on entry size, total size, or compression ratio. This allows attackers to upload highly compresse...

CVE-2026-78208: External Control of File Name or Path

exceljs through 4.4.0 contains a path traversal vulnerability in the Workbook.addImage function that fails to validate file paths. Attackers can supply arbitrary file paths to read any file accessible to the Node.js process and embed it in the generated workbook...

PT-2026-79801

Name of the Vulnerable Software and Affected Versions exceljs-hardened versions prior to 5.0.0 Description A path traversal issue exists in the Workbook.addImage function due to insufficient validation of file paths. This allows an attacker to provide arbitrary file paths to read any file...

CVE-2026-78209: Improper Neutralization of Formula Elements in a CSV File

exceljs through 4.4.0 fails to neutralize leading equals, plus, minus, or at signs in cell values written to CSV output. Attackers who can influence exported cell values can inject formulas that execute when the CSV file is opened in a spreadsheet application, potentially exfiltrating data or...

EUVD-2018-0433

Malware in sbrugna...

Malicious Package

Overview exceljs-ui is a malicious package. This package contains malicious code, and its content was removed from the official package manager. While this package might be attempting to impersonate a valid organization, there is no connection between that organization and this package authorship...

Malware in exceljs-ui

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outsid...

Malicious code in exceljs-ui (npm)

--- -= Per source details. Do not edit below this line.=- Source: ghsa-malware 542e79c60c18aa779332620c884952b318f885c798a0ac8c2d3bf87bfad26950 Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be...

MAL-2025-6361 Malicious code in exceljs-ui (npm)

--- -= Per source details. Do not edit below this line.=- Source: ghsa-malware 542e79c60c18aa779332620c884952b318f885c798a0ac8c2d3bf87bfad26950 Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be...

Cross-Site Scripting

Overview Versions of exceljs before 1.6.0 are vulnerable to cross-site scripting. This vulnerability is due to exceljs does not validate data from parsed XLSX file and allows to embed HTML tags, like , directly in the sheet cells. Because of this it's possible to inject malicious JavaScript code...

GHSA-2J2J-8RRV-264G Cross-Site Scripting in exceljs

Versions of exceljs before 1.6.0 are vulnerable to cross-site scripting. This vulnerability is due to exceljs not validating data from parsed XLSX file and embedding HTML tags, like directly into the sheet cells. Because of this it's possible to inject malicious JavaScript code and execute it whe...

Cross-Site Scripting in exceljs

Versions of exceljs before 1.6.0 are vulnerable to cross-site scripting. This vulnerability is due to exceljs not validating data from parsed XLSX file and embedding HTML tags, like directly into the sheet cells. Because of this it's possible to inject malicious JavaScript code and execute it whe...

exceljs cross-site scripting vulnerability

exceljs is a software package for reading, manipulating and writing spreadsheet data and styles. A cross-site scripting vulnerability exists in versions of exceljs prior to 1.6. A remote attacker can exploit this vulnerability to execute JavaScript code embedded in an XLS worksheet with the help ...

Design/Logic Flaw

An unescaped payload in exceljs v1.6 allows a possible XSS via cell value when worksheet is displayed in browser...

CVE-2018-16459

An unescaped payload in exceljs v1.6 allows a possible XSS via cell value when worksheet is displayed in browser...

CVE-2018-16459

An unescaped payload in exceljs v1.6 allows a possible XSS via cell value when worksheet is displayed in browser...

CVE-2018-16459

An unescaped payload in exceljs v1.6 allows a possible XSS via cell value when worksheet is displayed in browser...