CVE-2026-40296: Improper Neutralization of Input During Web Page Generation

PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. The HTML writer skips htmlspecialchars escaping when a cell's formatted value differs from the original value. When a cell has a custom number format containing the text placeholder @ along with any additional literal...

CVE-2026-35453 PhpSpreadsheet XSS via number format text substitution in HTML Writer

PhpSpreadsheet is a library for reading and writing spreadsheet files. In versions 1.30.3 and earlier, 2.0.0 through 2.1.15, 2.2.0 through 2.4.4, 3.3.0 through 3.10.4, and 4.0.0 through 5.6.0, the HTML Writer skips htmlspecialchars output escaping when a cell uses a custom number format containin...

CVE-2026-35453

PhpSpreadsheet is a library for reading and writing spreadsheet files. In versions 1.30.3 and earlier, 2.0.0 through 2.1.15, 2.2.0 through 2.4.4, 3.3.0 through 3.10.4, and 4.0.0 through 5.6.0, the HTML Writer skips htmlspecialchars output escaping when a cell uses a custom number format containin...

CVE-2026-35453 PhpSpreadsheet XSS via number format text substitution in HTML Writer

PhpSpreadsheet is a library for reading and writing spreadsheet files. In versions 1.30.3 and earlier, 2.0.0 through 2.1.15, 2.2.0 through 2.4.4, 3.3.0 through 3.10.4, and 4.0.0 through 5.6.0, the HTML Writer skips htmlspecialchars output escaping when a cell uses a custom number format containin...

CVE-2026-35453

PhpSpreadsheet contains an XSS vulnerability in the HTML Writer when a cell uses a custom number format with an @ placeholder and additional literal text. The formatter returns early and escaping via htmlspecialchars() is skipped, allowing injected HTML/JavaScript in the generated HTML. Affected ...

CVE-2026-35453 PhpSpreadsheet XSS via number format text substitution in HTML Writer

PhpSpreadsheet is a library for reading and writing spreadsheet files. In versions 1.30.3 and earlier, 2.0.0 through 2.1.15, 2.2.0 through 2.4.4, 3.3.0 through 3.10.4, and 4.0.0 through 5.6.0, the HTML Writer skips htmlspecialchars output escaping when a cell uses a custom number format containin...

CVE-2026-35453: Improper Neutralization of Input During Web Page Generation

PhpSpreadsheet is a library for reading and writing spreadsheet files. In versions 1.30.3 and earlier, 2.0.0 through 2.1.15, 2.2.0 through 2.4.4, 3.3.0 through 3.10.4, and 4.0.0 through 5.6.0, the HTML Writer skips htmlspecialchars output escaping when a cell uses a custom number format containin...

PhpSpreadsheet has XSS via number format code with @ text placeholder bypasses htmlspecialchars in HTML writer

It was discovered that there is a way to bypass HTML escaping in the HTML writer using custom number format codes. The Problem In Writer/Html.php around line 1592, the code checks if the formatted cell data equals the original data to decide whether to apply htmlspecialchars: php if $cellData ===...

GHSA-HRMW-QPRP-WGMC PhpSpreadsheet has XSS via number format code with @ text placeholder bypasses htmlspecialchars in HTML writer

It was discovered that there is a way to bypass HTML escaping in the HTML writer using custom number format codes. The Problem In Writer/Html.php around line 1592, the code checks if the formatted cell data equals the original data to decide whether to apply htmlspecialchars: php if $cellData ===...

Cross-site Scripting (XSS)

Overview phpoffice/phpspreadsheet is a Spreadsheet engine that Read, Create and Write Spreadsheet documents in PHP . Affected versions of this package are vulnerable to Cross-site Scripting XSS in the HTML generation process when a cell uses a custom number format containing the @ text placeholde...

GHSA-6WPP-88CP-7Q68 PhpSpreadsheet has XSS via NumberFormat @ Text Substitution in HTML Writer

Summary The HTML Writer in PhpSpreadsheet bypasses htmlspecialchars output escaping when a cell uses a custom number format containing the @ text placeholder with additional literal text e.g., @ "items" or "Total: "@. This allows an attacker to inject arbitrary HTML and JavaScript into the...

PhpSpreadsheet has XSS via NumberFormat @ Text Substitution in HTML Writer

Summary The HTML Writer in PhpSpreadsheet bypasses htmlspecialchars output escaping when a cell uses a custom number format containing the @ text placeholder with additional literal text e.g., @ "items" or "Total: "@. This allows an attacker to inject arbitrary HTML and JavaScript into the...

PT-2026-35931

Name of the Vulnerable Software and Affected Versions PhpSpreadsheet versions prior to 1.30.4 PhpSpreadsheet versions 2.0.0 through 2.1.15 PhpSpreadsheet versions 2.2.0 through 2.4.4 PhpSpreadsheet versions 3.3.0 through 3.10.4 PhpSpreadsheet versions 4.0.0 through 5.6.0 Description The HTML Writ...

TencentOS Server 2: libxslt (TSSA-2025:0280)

The version of Tencent Linux installed on the remote TencentOS Server 2 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2025:0280 advisory. Package updates are available for TencentOS Server 2 that fix the following vulnerabilities...

OESA-2025-2613 perl-Spreadsheet-ParseExcel security update

The Spreadsheet::ParseExcel module can be used to read information from an Excel 95-2003 file. Security Fixes: Spreadsheet::ParseExcel version 0.65, a Perl module for parsing Excel files, is vulnerable to arbitrary code execution ACE due to passing unvalidated input from a file into a string-type...

OESA-2025-2508 perl-Spreadsheet-ParseExcel security update

The Spreadsheet::ParseExcel module can be used to read information from an Excel 95-2003 file. Security Fixes: Spreadsheet::ParseExcel version 0.65, a Perl module for parsing Excel files, is vulnerable to arbitrary code execution ACE due to passing unvalidated input from a file into a string-type...

OESA-2025-2507 perl-Spreadsheet-ParseExcel security update

The Spreadsheet::ParseExcel module can be used to read information from an Excel 95-2003 file. Security Fixes: Spreadsheet::ParseExcel version 0.65, a Perl module for parsing Excel files, is vulnerable to arbitrary code execution ACE due to passing unvalidated input from a file into a string-type...

EUVD-2018-18103

Malware in sbrugna...

EUVD-2022-3566

Malicious code in bioql PyPI...

Linux Distros Unpatched Vulnerability : CVE-2018-6345

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - The function numberformat is vulnerable to a heap overflow issue when its second argument $decpoints is excessively large. The internal implementation of the...