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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
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
3<= 1.30.2+ 1 more
- (no CPE)range: <= 1.30.2
- cpe:2.3:a:phpoffice:phpspreadsheet:*:*:*:*:*:*:*:*range: <1.30.3
Patches
Vulnerability mechanics
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
0No linked articles in our index yet.