CVE-2026-34084
Description
PhpSpreadsheet is a library for reading and writing spreadsheet files. In versions 1.30.2 and earlier, 2.0.0 through 2.1.14, 2.2.0 through 2.4.3, 3.3.0 through 3.10.3, and 4.0.0 through 5.5.0, when the filename argument to IOFactory::load() is user-controlled, an attacker can supply a PHP stream wrapper path (such as phar://, ftp://, or ssh2.sftp://) that passes the is_file() check in File::assertFile(). The phar:// wrapper triggers deserialization of the PHAR metadata, which can lead to remote code execution if a suitable gadget chain is available in the application. The ftp:// and ssh2.sftp:// wrappers can be used for server-side request forgery. This issue has been fixed in versions 1.30.3, 2.1.15, 2.4.4, 3.10.4, and 5.6.0.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
phpoffice/phpspreadsheetPackagist | >= 4.0.0, < 5.6.0 | 5.6.0 |
phpoffice/phpspreadsheetPackagist | >= 3.3.0, < 3.10.4 | 3.10.4 |
phpoffice/phpspreadsheetPackagist | >= 2.2.0, < 2.4.4 | 2.4.4 |
phpoffice/phpspreadsheetPackagist | >= 2.0.0, < 2.1.15 | 2.1.15 |
phpoffice/phpspreadsheetPackagist | < 1.30.3 | 1.30.3 |
Affected products
2<= 1.30.2+ 1 more
- (no CPE)range: <= 1.30.2
- cpe:2.3:a:phpoffice:phpspreadsheet:*:*:*:*:*:*:*:*range: <1.30.3
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
4- github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-q4q6-r8wh-5cghnvdExploitMitigationVendor AdvisoryWEB
- github.com/advisories/GHSA-q4q6-r8wh-5cghghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-34084ghsaADVISORY
- www.php.net/manual/en/wrappers.phpghsaWEB
News mentions
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