Detections
Analytics
Cursor < 3.0 Multiple Sandbox Escapes
critical Nessus Plugin ID 324969
Synopsis
The Cursor instance installed on the remote host is affected by multiple sandbox escape vulnerabilities.Description
The version of Cursor installed on the remote host is prior to 3.0.It is, therefore, affected by multiple vulnerabilities:
- A flaw in the agent sandbox allows a malicious agent to manipulate the working_directory parameter, causing the sandbox to include writable paths outside the intended workspace. This enables non-sandboxed remote code execution under the user's privileges with no user interaction beyond a benign prompt.
(CVE-2026-50548)
- A flaw in the agent sandbox path canonicalization allows a malicious agent to create an in-workspace symlink pointing outside the workspace and force canonicalization to fail, resulting in unapproved writes to arbitrary locations. This enables non-sandboxed remote code execution under the user's privileges with no user interaction beyond a benign prompt.
(CVE-2026-50549)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Upgrade Cursor to version 3.0 or later.See Also
Plugin Details
Severity: Critical
ID: 324969
File Name: cursor_3_0.nasl
Version: 1.2
Type: Local
Agent: windows, macosx, unix
Family: Artificial Intelligence
Published: 7/3/2026
Updated: 7/6/2026
Configuration: Enable thorough checks (optional)
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: High
Score: 7.6
Percentile: 98.47
CVSS v2
Risk Factor: Critical
Base Score: 10
Temporal Score: 7.4
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2026-50549
CVSS v3
Risk Factor: Critical
Base Score: 9.8
Temporal Score: 8.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: Critical
Base Score: 9.3
Threat Score: 8.1
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Vulnerability Information
CPE: x-cpe:/a:anysphere:cursor, cpe:/a:anysphere:cursor
Required KB Items: installed_sw/Anysphere Cursor
Exploit Ease: No known exploits are available
Patch Publication Date: 4/2/2026
Vulnerability Publication Date: 6/5/2026
Reference Information
CVE: CVE-2026-50548, CVE-2026-50549