PatchSiren cyber security CVE debrief

CVE-2026-48124 cursor CVE debrief

CVE-2026-48124 is a high-severity vulnerability (CVSS Score: 8.5) affecting Cursor, a code editor built for programming with AI. In versions prior to 3.0.0, the Cursor Desktop could execute workspace-defined Claude hook commands from `.claude/settings.local.json` without dedicated user approval. A malicious workspace or agent-created file could configure hooks that run local commands in the user's context when an agent turn ends. This could allow sandbox escape, persistence across turns, local data access, or follow-on compromise. The issue has been fixed in version 3.0.0.

Vendor: cursor
Product: Unknown
CVSS: HIGH 8.5
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-15
Original CVE updated: 2026-06-16
Advisory published: 2026-06-15
Advisory updated: 2026-06-16

Who should care

Users of Cursor code editor versions prior to 3.0.0 should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability allows execution of workspace-defined Claude hook commands without user approval, potentially leading to sandbox escape, persistence, local data access, or follow-on compromise.

Defensive priority

High

Recommended defensive actions

Upgrade to Cursor version 3.0.0 or later.
Review and restrict workspace-defined Claude hook commands in `.claude/settings.local.json`.
Monitor for suspicious activity in Cursor Desktop.

Evidence notes

CVE-2026-48124 was published on 2026-06-15T21:17:13.927Z and has a CVSS Score of 8.5.

Official resources

CVE-2026-48124 was published on 2026-06-15T21:17:13.927Z.