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.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| MITHALDU | PDF::WebKit | unaffected |
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Solution
No solution given by the vendor.
Workaround
No fixed release is available. Apply the patch, which reads both paths with a 3-arg open so the value is never interpreted as a command or redirect. Otherwise, do not pass untrusted input as the output path to to_pdf or to_file, or as an entry in the stylesheets list. Note that the wkhtmltopdf project is no longer being developed, and users of this package should migrate to alternative solutions.
Wed, 12 Aug 2026 23:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| 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 | |
| Weaknesses | CWE-73 CWE-78 |
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| References |
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Projects
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MITRE
Status: PUBLISHED
Assigner: CPANSec
Published:
Updated: 2026-08-12T23:12:57.958Z
Reserved: 2026-07-25T08:39:34.495Z
Link: CVE-2026-17431
Vulnrichment
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NVD
Status : Received
Published: 2026-08-13T00:17:31.917
Modified: 2026-08-13T00:17:31.917
Link: CVE-2026-17431
Redhat
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OpenCVE Enrichment
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