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Vulnerability record · CVE-2026-44211 · published 1 June 2026

CVE-2026-44211: Cline missing authentication for critical function vulnerability

Cline · Cline

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.

9.6 CVSS 3.1 Critical EPSS 0.21% · top 90.3% CWE-306 · Missing authentication for critical functionCWE-1385 · CWE-1385
9.6CVSS 3.1 base score
0.21%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
22 Jul 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-44211), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.