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.
Exploitability
AV:LAC:LAT:PPR:NUI:AVulnerable System
VC:HVI:HVA:NSubsequent System
SC:NSI:NSA:N7/CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:NInput Validation