PhpSpreadsheet is a widely used tool that helps websites work with spreadsheet files such as Excel or CSV documents. A security vulnerability affects multiple versions of this library, including all 1.x releases up to 1.30.2, 2.x releases from 2.0.0 to 2.1.14 and 2.2.0 to 2.4.3,
Source: NVD (National Vulnerability Database) — https://nvd.nist.gov/vuln/detail/CVE-2026-34084
