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.
References
| Link | Resource |
|---|---|
| https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-q4q6-r8wh-5cgh | Exploit Mitigation Vendor Advisory |
| https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-q4q6-r8wh-5cgh | Exploit Mitigation Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
08 May 2026, 17:10
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 9.8 |
| References | () https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-q4q6-r8wh-5cgh - Exploit, Mitigation, Vendor Advisory | |
| First Time |
Phpoffice phpspreadsheet
Phpoffice |
|
| CPE | cpe:2.3:a:phpoffice:phpspreadsheet:*:*:*:*:*:*:*:* |
05 May 2026, 20:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-05 20:16
Updated : 2026-05-08 17:10
NVD link : CVE-2026-34084
Mitre link : CVE-2026-34084
CVE.ORG link : CVE-2026-34084
JSON object : View
Products Affected
phpoffice
- phpspreadsheet