PyPI/briefcase CVE-2026-33430: high 7.3, EPSS 0.15%

Briefcase: Windows MSI Installer Privilege Escalation via Insecure Directory Permissions

Action: Upgrade briefcase to 0.3.26 or later.

pip install briefcase==0.3.26

Affected

Fixed versions

Sources

• osv: GHSA-r3r2-35v9-v238
• https://github.com/beeware/briefcase/security/advisories/GHSA-r3r2-35v9-v238
• https://nvd.nist.gov/vuln/detail/CVE-2026-33430
• https://github.com/beeware/briefcase/issues/2759
• https://github.com/beeware/briefcase-windows-VisualStudio-template/pull/85
• https://github.com/beeware/briefcase-windows-app-template/pull/86
• https://github.com/beeware/briefcase
• https://github.com/pypa/advisory-database/tree/main/vulns/briefcase/PYSEC-2026-27.yaml

CVE-2026-33430 · published 2026-03-23T21:40:10Z · modified 2026-06-05T14:30:11.172961403Z · JSON