CVE-2026-61613Network attack vector

Session code execution via unauthenticated control endpoint

Published Jul 15, 2026 · Updated Jul 15, 2026

Missing authentication in Cursor Cloud Agents before 03/31/2026 allows remote attackers to execute code through a local control endpoint. Browser-loaded attacker-controlled content can reach the unauthenticated endpoint from inside the agent container, gaining session-level access to files, repository contents, environment variables, credentials, and GitHub App tokens. Exploitation requires a browser-capable Cloud Agent configuration and a browser flow that loads attacker-controlled content; effects remain bounded by the session and its granted permissions.

CVSS severity7.7
High
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in Cursor Cloud Agents before 03/31/2026 allows remote attackers to execute code through a local control endpoint. Browser-loaded attacker-controlled content can reach the unauthenticated endpoint from inside the agent container, gaining session-level access to files, repository contents, environment variables, credentials, and GitHub App tokens. Exploitation requires a browser-capable Cloud Agent configuration and a browser flow that loads attacker-controlled content; effects remain bounded by the session and its granted permissions.

The record

CVE
CVE-2026-61613
Published
Jul 15, 2026
Updated
Jul 15, 2026
Vendor
Anysphere
Product
Cursor
Classifications
CWE-306, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 03/31/2026

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Anysphere · Cursorversion=< 03/31/2026

Published CVSS scores

7.7GitHub, Inc.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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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