CVE-2026-78192: vulnerability in WebDyne
WebDyne versions from 2.022 before 3.022 for Perl disclose application source to unauthenticated clients via the viewer in the default index page
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
WebDyne versions from 2.022 before 3.022 for Perl disclose application source to unauthenticated clients via the viewer in the default index page.
WebDyne's wrapper scripts, such as webdyne.psgi, enable the built-in index page by default. Its source viewer returns files under the document root named in the source parameter of an HTMX request, including .psp, .pm and .pl files.
A remote attacker can read the application's Perl code, including the __PERL__ blocks of .psp pages and any credentials they hold.
Affected products
WebDyneRelated CVEs — WebDyne
In the same product, most dangerous first.
CVE-2026-78191—WebDyne versions from 2.031 before 3.022 for Perl execute files with .psp anywhere in the name as Perl pagesEPSS 0.5%CVE-2026-78189—WebDyne versions from 3.007 before 3.022 for Perl execute .psp files outside the document root via path traversal in the PSGI API route fallbackEPSS 0.2%CVE-2026-78190—WebDyne versions from 2.014 before 3.022 for Perl reflect request parameters unescaped into form field values, allowing cross-site scriptingEPSS 0.2%CVE-2026-78188—WebDyne versions from 2.014 before 3.022 for Perl issue session cookies without the Secure, HttpOnly and SameSite attributesEPSS 0.1%