Cline Kanban Server has a Cross-Origin WebSocket Hijacking Vulnerability
Priority HIGH 76CWE-1385Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-306.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0018 7th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| cline | cline | up to 2.13.0 | — | No fix listed | CNA |
| — | cline (npm) | up to 2.13.0 | — | No fix listed | GHSA-5c57-rqjx-35g2 |
- cline Vendorcline Affected up to 2.13.0 Fixed in — No fix listed CNA
- cline (npm) Vendor— Affected up to 2.13.0 Fixed in — No fix listed GHSA-5c57-rqjx-35g2
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-44211
- 2026-10-03 Alias added: GHSA-5c57-rqjx-35g2
References
More Cline vulnerabilities
- TI-2026-42592 Cline: Cross-Origin WebSocket Hijacking in Cline Hub Dashboard (`/browser` endpoint) CVSS 3.1HIGH 8.8
- TI-2026-23512 DSAI-Cline's command auto-approval module contains a critical OS command injection… CVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-44211 · CVE Program
- CVE-2026-44211 · NVD
- FIRST EPSS
- GHSA-5c57-rqjx-35g2 · GitHub Advisory Database · CC BY 4.0
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