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

> CVE-2026-61613: Cursor: Cloud Agent Browser Sandbox Escape. CVSS 7.7 (CVSS 4.0).

Canonical: https://rewindex.com/cve/CVE-2026-61613
Last updated: 2026-07-21T15:16:38Z

- Published: 2026-07-15 14:18 UTC · Updated: 2026-07-21 15:16 UTC · Assigner: GitHub\_M
- CVSS: 7.7 (CVSS 4.0) · Severity: High
- EPSS: 0.68%, 52th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-306

## 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.

## Affected vendors and products

- cursor: cursor

## Tracked companies

- [Cursor](https://rewindex.com/company/cursor.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-61613)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-61613)
- [https://github.com/cursor/cursor/security/advisories/GHSA-whx2-4gvm-m3r3](https://github.com/cursor/cursor/security/advisories/GHSA-whx2-4gvm-m3r3)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-61613 · Markdown: https://rewindex.com/cve/CVE-2026-61613.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-61613 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:10:41.495Z