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CVE-2026-34084— PhpSpreadsheet SSRF and RCE via PHP stream wrappers in IOFactory::load

Quick assessment

Affected
PHPOffice PhpSpreadsheet
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PhpSpreadsheet是PHPOffice开源的一款用于读取和写入电子表格文件的PHP库。 PhpSpreadsheet 1.30.2及之前版本、2.0.0至2.1.14版本、2.2.0至2.4.3版本、3.3.0至3.10.3版本和4.0.0至5.5.0版本存在代码问题漏洞，该漏洞源于IOFactory::load函数中文件名参数可被用户控制，攻击者可提供PHP流包装器路径绕过is_file检查，可能导致远程代码执行或服务端请求伪造。

AI Predicted 9.8 Difficulty: Moderate EPSS 0.71% · P51

Affected Version Matrix 5

VendorProduct Version RangeStatus
PHPOffice PhpSpreadsheet >= 4.0.0, <= 5.5.0 affected
>= 3.3.0, <= 3.10.3 affected
>= 2.2.0, <= 2.4.3 affected
>= 2.0.0, <= 2.1.14 affected
<= 1.30.2 affected
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I. Basic Information for CVE-2026-34084

Vulnerability Information
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Vulnerability Title
PhpSpreadsheet SSRF and RCE via PHP stream wrappers in IOFactory::load
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
PhpSpreadsheet 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PhpSpreadsheet是PHPOffice开源的一款用于读取和写入电子表格文件的PHP库。 PhpSpreadsheet 1.30.2及之前版本、2.0.0至2.1.14版本、2.2.0至2.4.3版本、3.3.0至3.10.3版本和4.0.0至5.5.0版本存在代码问题漏洞，该漏洞源于IOFactory::load函数中文件名参数可被用户控制，攻击者可提供PHP流包装器路径绕过is_file检查，可能导致远程代码执行或服务端请求伪造。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
PHPOffice PhpSpreadsheet >= 4.0.0, <= 5.5.0 -

II. Public POCs for CVE-2026-34084

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III. Intelligence Information for CVE-2026-34084

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Vendor Advisories for CVE-2026-34084 (1)

IV. Related Vulnerabilities

Same product: PhpSpreadsheet
Same vendor: PHPOffice
Same weakness: CWE-502

V. Comments for CVE-2026-34084

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