CVE-2026-61613

Cursor: Cloud Agent Browser Sandbox Escape

Published: Jul 15, 2026Updated: Jul 21, 2026 Sources: CVE List NVDCWE-306

N/ACVSS

NVD MITRE

Description

Cursor is a code editor built for programming with AI. Prior to the Cloud Agent fix on 03/31/2026, browser-enabled Cursor Cloud Agent sessions allowed attacker-controlled web content to connect from inside the agent container to an unauthenticated local agent endpoint, enabling code execution within the affected Cloud Agent sandbox or session and access to files, repository contents, environment variables, credentials, and GitHub App access tokens available to that session. This issue was fixed on 03/31/2026 by requiring authentication for the relevant agent endpoint.

No summary for this CVE yet.

Weaknesses

CWE-306

Affected Products

cursor

commercial·USaka cursor ai

cursorMixed

DevTools & CI / ide-editor

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Initial Access

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References

https://github.com/cursor/cursor/security/advisories/GHSA-whx2-4gvm-m3r3

github.com

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