CVE-2026-50549

Cursor is a code editor built for programming with AI. Prior to 3.0, Cursor runs agent terminal commands in a sandbox by default. Before a Write, the agent canonicalizes the target path to confirm it stays inside the workspace, but when canonicalization fails it falls back to the original path and writes without approval. A malicious agent can create an in-workspace symlink that points outside the workspace and force canonicalization to fail — either because the target does not exist or because read permission is removed from the path — so the agent writes through the symlink to an arbitrary location without approval. A malicious agent could write arbitrary files outside the workspace under the user's privileges. This enables non-sandboxed Remote Code Execution — for example by overwriting the cursorsandbox helper so later commands run unsandboxed — with no user interaction beyond a benign prompt. This vulnerability is fixed in 3.0.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/cursor/cursor/security/advisories/GHSA-3v8f-48vw-3mjx	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:anysphere:cursor:*:*:*:*:*:*:*:*

History

26 Jun 2026, 16:51

Type	Values Removed	Values Added
References	~~() https://github.com/cursor/cursor/security/advisories/GHSA-3v8f-48vw-3mjx -~~	() https://github.com/cursor/cursor/security/advisories/GHSA-3v8f-48vw-3mjx - Vendor Advisory
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 9.8
CPE		cpe:2.3:a:anysphere:cursor::::::::
First Time		Anysphere cursor Anysphere

25 Jun 2026, 19:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-25 19:16

Updated : 2026-06-26 16:51

NVD link : CVE-2026-50549

Mitre link : CVE-2026-50549

CVE.ORG link : CVE-2026-50549

JSON object : View

Products Affected

anysphere

cursor

CWE

CWE-59

Improper Link Resolution Before File Access ('Link Following')

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