Cline up to 3.0.29 Cline Hub Dashboard isAuthorizedBrowserRequest provider improper authorization

Summaryinfo

A vulnerability was found in Cline up to 3.0.29. It has been declared as critical. Impacted is the function isAuthorizedBrowserRequest of the component Cline Hub Dashboard. Such manipulation of the argument provider leads to improper authorization. This vulnerability is documented as CVE-2026-59723. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Cline up to 3.0.29 and classified as critical. Affected by this issue is the function isAuthorizedBrowserRequest of the component Cline Hub Dashboard. The manipulation of the argument provider with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Cline is an autonomous coding agent as an SDK, IDE extension, or CLI assistant. Prior to 3.0.30, the Cline Hub dashboard server launched by the cline dashboard command accepts WebSocket connections on the /browser endpoint without validating the Origin header, and when ROOM_SECRET is unset for local 127.0.0.1 binds, isAuthorizedBrowserRequest() allows attacker-controlled websites to send desktopCommand frames that read workspace state, mutate MCP and provider settings, and trigger command execution when a provider or model is configured. This issue is fixed in version 3.0.30.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-59723 since 07/06/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1548.002.

Upgrading to version 3.0.30 eliminates this vulnerability.

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Productinfo

Name

• Cline

Version

• 3.0.0
• 3.0.1
• 3.0.2
• 3.0.3
• 3.0.4
• 3.0.5
• 3.0.6
• 3.0.7
• 3.0.8
• 3.0.9
• 3.0.10
• 3.0.11
• 3.0.12
• 3.0.13
• 3.0.14
• 3.0.15
• 3.0.16
• 3.0.17
• 3.0.18
• 3.0.19
• 3.0.20
• 3.0.21
• 3.0.22
• 3.0.23
• 3.0.24
• 3.0.25
• 3.0.26
• 3.0.27
• 3.0.28
• 3.0.29

Website

• Product: https://github.com/cline/cline/

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