CVE Watch24 ago 2026

CVE-2026-78209

exceljs-hardened versions before 5.0.0 fail to neutralize leading equals, plus, minus, or at signs in cell values written to CSV output. Att

CVSS

8.2

Alto

EPSS

0.3%

p22

KEV

—

Exploit Today

0-100

Publicado: 24 ago 2026 · Última mod.: 24 ago 2026 · CWE-1236

EPSS · 30d

0.3%EPSS · 30 días0.3%

2026-08-242026-08-26

Descripción técnica

exceljs-hardened versions before 5.0.0 fail 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 performing other malicious actions.

Referencias oficiales

CVEs relacionados

CVECVSSEPSSKEVRExplotTítuloVis.

CVE-2026-56652—

—

———Dool in versions up to 1.3.8 is vulnerable to a CSV injection vulnerability when exporting data to a CSV file, as it fails to sanitize cell content beginning with special formula characters like =, +, -, or @. A local attacker can exploit this by running a process with a crafted name starting with =, which injects malicious formulas into the CSV output that execute when a victim opens the file in a spreadsheet application. The issue was addressed by pull request #1176h CVE-2026-195018.8 ALT

38.4%

——12CSV export functionality in Brainstorm Force SureForms version, <= 2.12.1, fails to neutralize spreadsheet formula characters in user-controlled form field names before generating CSV exports, which allows a remote attacker to execute spreadsheet formulas on an administrator's workstation when the exported CSV file is opened in a vulnerable spreadsheet application.6d CVE-2026-649556.1 MED

12.9%

——4When Microsoft Excel imports a CSV file, it executes cells beginning with certain characters as formulas, giving such CSV files arbitrary execution. Velociraptor fails to sanitize such cells when exporting to CSV from various places such as the GUI, offline collector or data exports. It is not clear if the vulnerability is actually in Microsoft Excel treating a CSV data file as executable content, or if Velociraptor should be sanitizing the data to prevent Excel from executing it. However, since this is such a common use case for Velociraptor we decided to highlight it in an advisory.16d CVE-2026-477059.6 CRÍ

31.5%

——9TypeBot is a chatbot builder tool. Version 3.16.1 has a CSV injection vulnerability in the result export functionality. The application does not sanitize or escape user-supplied input when generating CSV files. An attacker can inject spreadsheet formulas into input fields, which are later executed when an administrator opens the exported CSV in spreadsheet software such as Microsoft Excel or LibreOffice Calc. Version 3.17.0 patches the issue.15d CVE-2026-187384.7 MED

31.0%

——9Shlink versions 5.0.0 through 5.1.5 contain a CSV formula injection vulnerability that allows unauthenticated remote attackers to plant spreadsheet formulas into exported visit data by supplying malicious values in User-Agent, Referer, or request path headers beginning with formula-triggering characters such as =, +, -, or @. Attackers can craft a single unauthenticated request against any short URL to embed DDE or WEBSERVICE formula payloads into CSV cells, which are then executed on an administrator's client machine when the exported CSV file is opened in a spreadsheet application that evaluates formulas.23d CVE-2026-658757.1 ALT

4.6%

——1BaserCMS provided by baserCMS Users Community contains a CSV file injection vulnerability. If a user downloads and opens a CSV file containing malicious code injected by an attacker, the malicious code may be executed.24d