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CVE-2026-61613— Cursor: Cloud Agent Browser Sandbox Escape

Quick assessment

Affected
cursor cursor
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cursor是Cursor公司的一款深度集成AI的智能代码编辑器。 Cursor 03/31/2026之前版本存在授权问题漏洞，该漏洞源于未对本地代理端点进行身份验证，可能导致攻击者控制Web内容从代理容器内部连接到未经验证的本地代理端点，从而在受影响的Cloud Agent沙箱或会话中执行代码，并访问该会话可用的文件、仓库内容、环境变量、凭证和GitHub App访问令牌。

AI Predicted 9.8 Difficulty: Easy EPSS 0.68% · P50

Affected Version Matrix 1

VendorProduct Version RangeStatus
cursor cursor < 03/31/2026 affected
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I. Basic Information for CVE-2026-61613

Vulnerability Information
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Vulnerability Title
Cursor: Cloud Agent Browser Sandbox Escape
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Cursor 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cursor是Cursor公司的一款深度集成AI的智能代码编辑器。 Cursor 03/31/2026之前版本存在授权问题漏洞，该漏洞源于未对本地代理端点进行身份验证，可能导致攻击者控制Web内容从代理容器内部连接到未经验证的本地代理端点，从而在受影响的Cloud Agent沙箱或会话中执行代码，并访问该会话可用的文件、仓库内容、环境变量、凭证和GitHub App访问令牌。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
cursor cursor < 03/31/2026 -

II. Public POCs for CVE-2026-61613

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III. Intelligence Information for CVE-2026-61613

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Vendor Advisories for CVE-2026-61613 (1)

IV. Related Vulnerabilities

Same product: cursor
Same vendor: cursor
Same weakness: CWE-306

V. Comments for CVE-2026-61613

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