HIGHCVE-2026-4786Published Modified CNA PSF
CVE-2026-4786: Incomplete mitigation of CVE-2026-4519, %action expansion for command injection to webbrowser.open()
Mitgation of CVE-2026-4519 was incomplete. If the URL contained "%action" the mitigation could be bypassed for certain browser types the "webbrowser.open()" API could have commands injected into the underlying shell. See CVE-2026-4519 for details.
Metrics
- CVSS v4.0
- 7.0
- Severity
- HIGH
- Fixed in
- 3.15.0
- Affected Products
- 1
Affected packages
- Python Software Foundation / CPython< 3.15.0 (from 0)
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