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TI-2026-32406 Aliases CVE-2026-44467

Claude Desktop: SSH Host Key Verification Bypass Allows Man-in-the-Middle Attack on Remote Sessions

Priority LOW 33CWE-297Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

The Claude Desktop app gives you Claude Code with a graphical interface built for running multiple sessions side by side. From 1.2581.0 to before 1.4304.0, Claude Desktop's SSH remote development feature verified only whether a hostname existed in ~/.ssh/known_hosts without comparing the server's presented host key against the stored key. This allowed a network-positioned attacker to present an arbitrary SSH host key and have the connection silently accepted, enabling a man-in-the-middle attack on remote development sessions. Successful exploitation required the attacker to be in a network position to intercept SSH traffic (e.g., via ARP spoofing, rogue Wi-Fi, or DNS poisoning) and the target hostname to already have an entry in the victim's known_hosts file. This vulnerability is fixed in 1.4304.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00135 2nd percentileScored 2026-11-07
Fix Fixed claude-code (anthropics): 1.4304.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
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

VendorProductAffected versionsFixed inStatusSource
anthropicsclaude-code1.2581.0 to before 1.4304.01.4304.0Patch availableCNA
  • claude-code Vendoranthropics Affected 1.2581.0 to before 1.4304.0 Fixed in 1.4304.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:anthropic:claude_desktop:*:*:*:*:*:*:*:*1.2581.0 to before 1.4304.0Vulnerableanthropics
  • cpe:2.3:a:anthropic:claude_desktop:*:*:*:*:*:*:*:* Versions 1.2581.0 to before 1.4304.0 Vulnerable ·anthropics

Remediation

  • Fix · CNA claude-code (anthropics) Fixed in 1.4304.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-44467

References

Advisory 1

  • TI-2026-32409 Claude Desktop: Local Privilege Escalation via Directory Junction in CoworkVMService CVSS 4.0HIGH 8.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences