Malicious Package Affecting async_println package, versions *
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Snyk has reported that there have been attempts or successful attacks targeting this vulnerability.
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Test your applications- Snyk IDSNYK-RUST-ASYNCPRINTLN-13053583
- published26 Sept 2025
- disclosed23 Sept 2025
- creditKirill Boychenko
Introduced: 23 Sep 2025
New Malicious CVE NOT AVAILABLE CWE-506 (opens in a new tab)How to fix?
Avoid using all malicious instances of the async_println package.
Overview
async_println is a malicious package.
Two malicious Rust crates, faster_log (impersonates the legitimate fast_log library) and async_println attempt to scan source files for Quoted Ethereum private keys (0x + 64 hex), Solana-style Base58 secrets and Bracketed byte arrays to later exfiltrate matches via HTTP POST to a hardcoded command and control (C2) endpoint https://mainnet[.]solana-rpc-pool[.]workers[.]dev/. The payload runs at application or test runtime, specifically during log packing operation, not at the build process.
Note:
If you have installed or used these crate since May 25th 2025, assume exposure: uninstall them, rotate any secrets that could have been exposed in source, tests, fixtures.