CVE-2026-4519 — webbrowser.open() allows leading dashes in URLs
The webbrowser.open() API would accept leading dashes in the URL which could be handled as command line options for certain web browsers. New behavior rejects leading dashes. …
Published: 2026-03-20 · CVSS: 7.0 · CVSS 4.0
The webbrowser.open() API would accept leading dashes in the URL which could be handled as command line options for certain web browsers. New behavior rejects leading dashes. Users are recommended to sanitize URLs prior to passing to webbrowser.open().
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7