OpenSSF/OSV advisory MAL-2026-6470 confirms this npm version as malicious. Package name `chlklib` is a one-character deletion of the popular `chalk` package and replicates chalk's public API surface (Chalk, chalkStderr, supportsColor, colorNames). On require/import, the main entry invokes `getOriginal()` at module top level, which POSTs to https://funnystore.org/lib/index.php, XOR-decodes the response body with a hardcoded key, and passes the result to `eval()` (see...
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in chlklib (npm)
Details
Package name `chlklib` is a one-character deletion of the popular `chalk` package and replicates chalk's public API surface (Chalk, chalkStderr, supportsColor, colorNames). On require/import, the main entry invokes `getOriginal()` at module top level, which POSTs to https://funnystore.org/lib/index.php, XOR-decodes the response body with a hardcoded key, and passes the result to `eval()` (see dist/vendor/original-color/index.cjs around line 55, invoked from dist/index.cjs). Any developer who installs and requires this package — most likely after mistyping `chalk` — immediately executes attacker-controlled JavaScript fetched at runtime from funnystore.org. The remote endpoint is mutable and unrelated to the package's stated 'terminal prompt' purpose, giving the operator full RCE on the installer's machine on every require. The XOR-then-eval obfuscation and typosquat-with-replicated-API shape together match a deliberate dropper campaign rather than any legitimate use case.
Decision reason
OpenSSF Malicious Packages via OSV confirms chlklib@1.2.3 as malicious (MAL-2026-6470): Malicious code in chlklib (npm)