CVE-2026-4519

CVE Details

Release Date:	2026-03-20
Impact:	Important	What is this?

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().

See more information about CVE-2026-4519 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	7.1
Vector String:	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L
Version:	3.1
Attack Vector:	Network
Attack Complexity:	High
Privileges Required:	None
User Interaction:	Required
Scope:	Unchanged
Confidentiality Impact:	High
Integrity Impact:	High
Availability Impact:	Low

Errata information

Platform	Errata	Release Date
Oracle Linux version 10 (python3.12)	ELSA-2026-6256	2026-03-31
Oracle Linux version 8 (python3.11)	ELSA-2026-6281	2026-03-31
Oracle Linux version 8 (python3.12)	ELSA-2026-6283	2026-03-31
Oracle Linux version 9 (python3.11)	ELSA-2026-6286	2026-03-31
Oracle Linux version 9 (python3.12)	ELSA-2026-6285	2026-03-31