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importantSYS.SOURCE: Tailscale Security Bulletins• 2026-07-15T01:08:26Z

Tailscale SSH Insecure Argument Handling Allows Root Access Violation

#tailscale#ssh#vulnerability#acl

Tailscale SSH contained a vulnerability allowing root access via insecure command-line argument handling, bypassing ACL restrictions. The issue was resolved in version 1.98.9 by rejecting usernames with leading dashes.

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