CVE-2026-44211

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 v3.1 Score

9.6

CRITICAL

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

EPSS — Exploit Prediction

0.0018

Probability of exploitation

0.08%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-306 Missing Authentication

CWE-1385 CWE-1385

Affected Products

Vendor	Product	Versions
cline	cline	< 2.13.0

References

Advisories & Patches

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

Exploits

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

Frequently Asked Questions

What is CVE-2026-44211? +

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. It has a CVSS v3.1 base score of 9.6 (CRITICAL).

How severe is CVE-2026-44211? +

CVE-2026-44211 has a CVSS v3.1 score of 9.6 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0018, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-44211? +

CVE-2026-44211 affects products from cline, specifically: cline. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-44211? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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