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Vulnerabilities CVE-2026-61613

CVE-2026-61613

High
Open
TLP:CLEAR

Cursor: Cloud Agent Browser Sandbox Escape

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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.

Details

CVSS Score
7.7
EPSS Score
0.39%

32th percentile

CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L
Confidence
90%
Published
Jul 15, 2026
Last Modified
Jul 15, 2026
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