AI developer toolsBriefConfirmed by two or more outlets

CVE-2026-35603: ProgramData configuration trust in Claude Code, Cursor, Codex CLI and Gemini CLI (Cymulate), 2026

A writable system-wide configuration folder on Windows gave hook/notify privilege escalation to every user.

Disclosed

Live scores

Live scores

CVE-2026-35603
EPSS
0.001
low predicted chance of attack
VEDAS
0.054
little exploit evidence
On CISA KEV
Not listed
Detection rule
Out of scope (local)

Sources

This is a brief: a short, sourced summary from our incident tracking. Full advisories add commands to check whether you are affected.