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CLSA-2026-1777946712 python: Fix of CVE-2026-4519

🗓️ 05 May 2026 02:05:16Reported by GoogleType 
osv
 osv🔗 osv.dev👁 6 Views

Python fix for CVE-2026-4519 rejects leading dashes in webbrowser URLs and fixes an action-substitution bypass in UnixBrowser.open.

Related
Refs
ReporterTitlePublishedViews
Family
IBM Security Bulletins		Security Bulletin: IBM Watson Speech Services Cartridge is vulnerable to multiple Operator package issues
10 Jun 202618:06
–ibm
IBM Security Bulletins		Security Bulletin: IBM App Connect Enterprise Certified Container UBI updates
7 May 202613:38
–ibm
FreeBSD		Python -- The webbrowser.open() API allows leading dashes
20 Mar 202600:00
–freebsd
FreeBSD		python -- more webbrowser.open() command injection vulnerabilities
6 Apr 202600:00
–freebsd
ATTACKERKB		CVE-2026-4519
20 Mar 202615:08
–attackerkb
ATTACKERKB		CVE-2026-4786
13 Apr 202621:52
–attackerkb
Tenable Nessus		Amazon Linux 2023 : python3.13, python3.13-devel, python3.13-freethreading (ALAS2023-2026-1555)
13 Apr 202600:00
–nessus
Tenable Nessus		Amazon Linux 2023 : python3.14, python3.14-devel, python3.14-freethreading (ALAS2023-2026-1556)
13 Apr 202600:00
–nessus
Tenable Nessus		Amazon Linux 2023 : python3.12, python3.12-devel, python3.12-idle (ALAS2023-2026-1557)
13 Apr 202600:00
–nessus
Tenable Nessus		Amazon Linux 2023 : python3.11, python3.11-devel, python3.11-idle (ALAS2023-2026-1558)
13 Apr 202600:00
–nessus
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01 Jun 2026 00:33Current
7.1High risk
Vulners AI Score7.1
CVSS 3.13.3 - 7.1
CVSS 47
EPSS0.00308
SSVC
leading dasheswebbrowser urlsexternal browsersaction substitutionunixbrowser open
6