CVE-2026-44211 | BDVDB-2026-337083 Detail

clinecline

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.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: network.

Weaknesses#

CWE-306 Missing Authentication for Critical Function
CWE-1385 Missing Origin Validation in WebSockets

References#

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

Exploit#

No public exploit known

History#

Version 12026-06-01Record published in the CVE List.
Version 22026-06-04Most recent update recorded in the CVE List.

Published

Published: 2026-06-01
Last modified: 2026-06-04

Vendor information

Vendor: cline
Product: cline

All cline vulnerabilities

Score

9.6 Critical

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 7.6.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Authentication Issues

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
<= 2.13.0
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

9.6 Critical

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

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	Required
Scope	Changed
Confidentiality	High
Integrity	High
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).