Cursor Agent Potentially Leaks Information using JSON schema
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-200.
Summary
Cursor is a code editor built for programming with AI. Prior to 0.51.0, by default, the setting json.schemaDownload.enable was set to True. This means that by writing a JSON file, an attacker can trigger an arbitrary HTTP GET request that does not require user confirmation. Since the Cursor Agent can edit JSON files, this means a malicious agent, for example, after a prompt injection attack already succeeded, could trigger a GET request to an attacker controlled URL, potentially exfiltrating other data the agent may have access to. This vulnerability is fixed in 0.51.0.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA cursor (getcursor) Fixed in 0.51.0
Timeline
- 2026-10-02 Threatist record created from CVE-2025-49150
More getcursor vulnerabilities
- TI-2024-32616 RCE via Prompt Injection Into Cursor's Terminal Cmd-K CVSS 4.0CRITICAL 9.2
- TI-2025-23142 Arbitrary file write from Cursor Agent through a prompt injection from malicious @Docs CVSS 3.1HIGH 8.1
- TI-2024-30620 TCC Bypass in Cursor's macOS Application CVSS 3.1LOW 3.8
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences