{"id":"CVE-2026-17431","state":"PUBLISHED","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","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.\n\nto_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.\n\nAny 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.","publishedAt":"2026-08-12T23:12:57.958Z","updatedAt":"2026-08-13T13:09:27.451Z","severity":{"score":6.1,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N","source":"CISA-ADP"},"assigner":"CPANSec","products":["MITHALDU PDF::WebKit"],"affected":[{"vendor":"MITHALDU","product":"PDF::WebKit","packageName":"PDF-WebKit","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.2","versionType":"custom"}],"collectionURL":"https://cpan.org/modules","programFiles":["lib/PDF/WebKit.pm"],"programRoutines":[{"name":"PDF::WebKit::to_pdf"},{"name":"PDF::WebKit::to_file"},{"name":"PDF::WebKit::_style_tag_for"}],"repo":"https://github.com/kingpong/perl-PDF-WebKit"}],"references":["https://github.com/kingpong/perl-PDF-WebKit/issues/8","https://security.metacpan.org/patches/P/PDF-WebKit/1.2/CVE-2026-17431-r1.patch","https://wkhtmltopdf.org/status.html","http://www.openwall.com/lists/oss-security/2026/08/13/3"],"weaknesses":["CWE-78","CWE-73"],"ingestedAt":"2026-10-29T20:11:00.674Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/17xxx/CVE-2026-17431.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-17431","state":"PUBLISHED","datePublished":"2026-08-12T23:12:57.958Z","dateUpdated":"2026-08-13T13:09:27.451Z","assignerShortName":"CPANSec","assignerOrgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","dateReserved":"2026-07-25T08:39:34.495Z"},"containers":{"cna":{"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","descriptions":[{"lang":"en","value":"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.\n\nto_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.\n\nAny 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."}],"affected":[{"vendor":"MITHALDU","product":"PDF::WebKit","packageName":"PDF-WebKit","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.2","versionType":"custom"}],"collectionURL":"https://cpan.org/modules","programFiles":["lib/PDF/WebKit.pm"],"programRoutines":[{"name":"PDF::WebKit::to_pdf"},{"name":"PDF::WebKit::to_file"},{"name":"PDF::WebKit::_style_tag_for"}],"repo":"https://github.com/kingpong/perl-PDF-WebKit"}],"references":[{"url":"https://github.com/kingpong/perl-PDF-WebKit/issues/8","tags":["issue-tracking"]},{"url":"https://security.metacpan.org/patches/P/PDF-WebKit/1.2/CVE-2026-17431-r1.patch","tags":["patch"]},{"url":"https://wkhtmltopdf.org/status.html"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-78","description":"CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')","lang":"en","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-73","description":"CWE-73 External Control of File Name or Path","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"CPANSec","orgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","dateUpdated":"2026-08-12T23:12:57.958Z"},"source":{"discovery":"UNKNOWN"},"workarounds":[{"lang":"en","value":"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.\n\nOtherwise, do not pass untrusted input as the output path to to_pdf or to_file, or as an entry in the stylesheets list.\n\nNote that the wkhtmltopdf project is no longer being developed, and users of this package should migrate to alternative solutions."}],"x_generator":{"engine":"cpansec-cna-tool 0.1"}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/08/13/3"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2026-08-13T02:53:50.907Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":6.1,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N","integrityImpact":"HIGH","userInteraction":"REQUIRED","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"LOW"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-08-13T13:09:23.223596Z","id":"CVE-2026-17431","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-13T13:09:27.451Z"}}]}}}