HarborGuard / CVE
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HIGHCVE-2026-4519Published Modified CNA PSF

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. Users are recommended to sanitize URLs prior to passing to webbrowser.open().

Metrics

CVSS v4.0
7.0
Severity
HIGH
Fixed in
3.13.13
Affected Products
1

Fix available

3.13.133.14.43.15.0a8
Patch commits
Affected packages
  • Python Software Foundation / CPython
    < 3.13.13 (from 0) · < 3.14.4 (from 3.14.0) · < 3.15.0a8 (from 3.15.0a1)
CVSS Vector
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
References