CVE-2026-59723 | THREATINT

Description

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.

PUBLISHED Reserved 2026-07-06 | Published 2026-07-08 | Updated 2026-07-10 | Assigner GitHub_M

HIGH: 8.8CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Problem types

CWE-346: Origin Validation Error

Product status

< 3.0.30

affected

References

github.com/.../cline/security/advisories/GHSA-3cj3-hqcr-g934 exploit

github.com/.../cline/security/advisories/GHSA-3cj3-hqcr-g934

github.com/cline/cline/pull/11724

github.com/...ommit/d09270940f5746f288cfc4a5039b46a2f4d5d01e

github.com/cline/cline/releases/tag/cli-v3.0.30

cve.org (CVE-2026-59723)

nvd.nist.gov (CVE-2026-59723)

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