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CVE-2026-44211— Cline Kanban Server has a Cross-Origin WebSocket Hijacking Vulnerability

CVSS 9.6 · Critical

Possible ATT&CK Techniques 1AI

T1557 · Adversary-in-the-Middle

Affected Version Matrix 1

VendorProductVersion RangeStatus
clinecline<= 2.13.0affected
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I. Basic Information for CVE-2026-44211

Vulnerability Information
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Vulnerability Title
Cline Kanban Server has a Cross-Origin WebSocket Hijacking Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
Cline is an autonomous coding agent as an SDK, IDE extension, or CLI assistant. In versions 2.13.0 and prior, there is a cross-origin WebSocket hijack vulnerability in Cline Kanban servers. At time of publication, there are no publicly available patches.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
关键功能的认证机制缺失
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
clinecline <= 2.13.0 -

II. Public POCs for CVE-2026-44211

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III. Intelligence Information for CVE-2026-44211

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Vendor Advisories for CVE-2026-44211 (1)

IV. Related Vulnerabilities

Same weakness: CWE-306

V. Comments for CVE-2026-44211

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