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CVE-2026-17431— PDF::WebKit versions through 1.2 for Perl allow OS command injection via a 2-arg open() of the output path in to_pdf and of stylesheet paths in _style_tag_for

Quick assessment

Affected
MITHALDU PDF::WebKit
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.

Philip Garrett PDF::WebKit是Philip Garrett个人开发者的一个将HTML转换为PDF的组件。 Philip Garrett PDF::WebKit 1.2及之前版本存在安全漏洞，该漏洞源于to_pdf和_style_tag_for中通过2-arg open()处理输出路径和样式表路径时未正确验证输入，管道符开头或结尾的值会被当作命令执行，重定向符开头的值会打开文件进行写入或追加，可能导致操作系统命令注入。

AI Predicted 7.5 Difficulty: Easy EPSS 0.95% · P61

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
MITHALDU PDF::WebKit ≤ 1.2 affected
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I. Basic Information for CVE-2026-17431

Vulnerability Information
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Vulnerability Title
PDF::WebKit versions through 1.2 for Perl allow OS command injection via a 2-arg open() of the output path in to_pdf and of stylesheet paths in _style_tag_for
Source: CVE Program / CVE List V5
Vulnerability Description
PDF::WebKit versions through 1.2 for Perl allow OS command injection via a 2-arg open() of the output path in to_pdf and of stylesheet paths in _style_tag_for. to_pdf reads the generated PDF back from its path argument, and _style_tag_for reads each entry of the stylesheets list, by assigning the path to a local @ARGV and reading it with the diamond operator, which opens each @ARGV element with Perl's 2-arg open(). A value that begins or ends with a pipe ("| cmd", "cmd |") is run as a command rather than opened as a file, and one that begins with a redirect ("> path", ">> path") opens that path for write or append. to_file forwards its path argument to to_pdf and reaches the same read. Any caller that forwards untrusted input as the output path or as a stylesheets entry can run a command under the process UID; with the "cmd |" form the command's output is returned in place of the PDF, and with the "> path" form the named file is truncated. Stylesheets may only be added to an HTML source, so a URL or file source exposes the output path alone.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Philip Garrett PDF::WebKit 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Philip Garrett PDF::WebKit是Philip Garrett个人开发者的一个将HTML转换为PDF的组件。 Philip Garrett PDF::WebKit 1.2及之前版本存在安全漏洞，该漏洞源于to_pdf和_style_tag_for中通过2-arg open()处理输出路径和样式表路径时未正确验证输入，管道符开头或结尾的值会被当作命令执行，重定向符开头的值会打开文件进行写入或追加，可能导致操作系统命令注入。
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
MITHALDU PDF::WebKit 0 ~ 1.2 -

II. Public POCs for CVE-2026-17431

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III. Intelligence Information for CVE-2026-17431

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Proof of Concept for CVE-2026-17431 (1)

Vendor Pages for CVE-2026-17431 (1)

Other References for CVE-2026-17431 (1)

IV. Related Vulnerabilities

Same product: PDF::WebKit
Same vendor: MITHALDU
Same weakness: CWE-78