PatchSiren

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.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-48124 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-48124

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-48124 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-48124

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.