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RUSTSEC-2026-0014

rpc-check was removed from crates.io for malicious code

Reported
Issued
Package
rpc-check (crates.io)
Type
Vulnerability
Patched
no patched versions

Description

It was attempting to steal credentials from the POLYMARKET_PRIVATE_KEY environment variable.

The malicious crate had 3 versions published on 2026-02-15 and had been downloaded only 155 times. There were no crates depending on this crate on crates.io.

Thanks to Sisong Li for finding and reporting this to the crates.io team!

Advisory available under CC0-1.0 license.