CVE-2026-16766
Shell command injection RCE in Catalyst::View::Wkhtmltopdf via unsanitized PDF options.
Is CVE-2026-16766 being exploited?
Not confirmed. CVE-2026-16766 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 1.4% probability of exploitation in the next 30 days.
How severe is CVE-2026-16766?
CVE-2026-16766 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-16766?
Yes. A fix has been recorded for CVE-2026-16766. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-16766 affect?
CVE-2026-16766 affects Catalyst::View::Wkhtmltopdf < 0.6.1, Perl Catalyst web apps using wkhtmltopdf, wkhtmltopdf CLI invoked by web apps. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-16766?
Upgrade to Catalyst::View::Wkhtmltopdf 0.6.1 or remove/replace wkhtmltopdf; sanitize PDF options.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution: attackers can inject shell commands via user-controlled PDF options (page_size, orientation, margins) to run arbitrary commands as the app user.
Immediate action required
- affected< 0.6.1
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.