CVE-2026-44211 | THREATINT

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.

PUBLISHED Reserved 2026-05-05 | Published 2026-06-01 | Updated 2026-06-04 | Assigner GitHub_M

CRITICAL: 9.6CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Problem types

CWE-306: Missing Authentication for Critical Function

CWE-1385: Missing Origin Validation in WebSockets

Product status

<= 2.13.0

affected

References

github.com/.../cline/security/advisories/GHSA-5c57-rqjx-35g2 exploit

github.com/.../cline/security/advisories/GHSA-5c57-rqjx-35g2

cve.org (CVE-2026-44211)

nvd.nist.gov (CVE-2026-44211)

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