Description

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().

Remediation

References

CVE-2026-4519

Related Vulnerabilities

TCExam Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Vulnerability (CVE-2020-5746)

Atlassian Confluence Server-Side Request Forgery (SSRF) Vulnerability (CVE-2020-29445)

WordPress Plugin WP Geoloc Cross-Site Scripting (1.0.0)

WordPress Plugin Post Connector Cross-Site Scripting (1.0.3)

Django Server-Side Request Forgery (SSRF) Vulnerability (CVE-2021-33571)

Severity

Low

Classification

CVE-2026-4519 CWE-20 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Tags

Missing Update Known Vulnerabilities