webpack-cache-cycle (npm) · Malicious Code
Affects webpack-cache-cycleSource GCVE Database
Malicious package : remove webpack-cache-cycle and rotate any secrets on hosts that installed it.
Data as of 15 Jul 2026, 12:53 UTC
Malicious package
Published to npm · OSV MAL-2026-5579
What to do
Remove webpack-cache-cycle from every project, lockfile and image that pulls it in. Treat any host that installed it as compromised: rotate the credentials, tokens and keys it could read, from a clean machine.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| npmwebpack-cache-cycle | Affected
| Fixed in– |
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Description
The npm package 'webpack-cache-cycle' version 0.1.4 contains malicious code that executes attacker-controlled JavaScript during installation. It uses a postinstall script to spawn a detached process that fetches and runs code from an obfuscated, anonymous URL. This behavior is unexpected for a webpack cache plugin and indicates a supply chain compromise. Systems with this package installed should be considered fully compromised, and all secrets on those systems must be rotated immediately.