Official Claude Code VS Code extension trojanized to install persistent SSH backdoor, 29M installs at risk

feelspeaceman · reddit · 2026-10-30

Security researchers disclose that the official Anthropic Claude Code extension on the marketplace (29M+ installs) was trojanized to plant a persistent SSH backdoor on infected hosts, linked to an attack that also delivered remote access trojans to Anthropic developer laptops. Claude Code users are urged to check extension versions and suspicious SSH configs/keys.

Related event: Officially-branded Claude Code extension poisoned in Cursor marketplace supply-chain attack(23 posts)→

Original post →

More from coding & agent

coding & agent channel →