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Malicious package

cache-managernpm

cache-manager is a confirmed malicious npm package (MAL-2026-11523) that typosquats a legitimate package to trick installs (malicious version 7.2.10). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in cache-manager (npm)

MAL-2026-11523
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall cache-manager

What this malware does

This tarball, published under the popular cache-manager name, ships an obfuscated preinstall dropper that does not exist in the upstream project. package.json declares "preinstall": "node setup.mjs", and setup.mjs is a single-line obfuscator.io-style bundle (string-array + RC4-style per-call decoder at i['tXsWiG']) that hides every URL, filename, and command literal. Decoding reveals the loader detects the host platform, downloads a matching Bun runtime archive from github.com/oven-sh/bun/releases (e.g. bun-linux-x64-baseline, bun-windows-x64-baseline), extracts it to a temp directory, marks it executable, and then invokes that freshly downloaded runtime via execFileSync against the sibling file Math_Symbol.js. Math_Symbol.js is a 727 KB // @bun @bun-cjs-tagged opaque bundle with hex-obfuscated identifiers and its own string-array decoder; it is not referenced by the package's advertised entry point (dist/index.cjs) and is only reachable through the preinstall dropper. The alternate-runtime aspect (executing under Bun rather than Node) ensures the terminal payload is not observable to Node-based scanning of the tarball. The upstream cache-manager package ships no preinstall, no setup.mjs, and no Math_Symbol.js, so this version is a supply-chain compromise or lookalike rather than a legitimate release. Installing this version causes attacker-controlled code to execute on the installer's machine at npm install time.

Malicious versions

1 flagged
7.2.10

Indicators of compromise (SHA-256)

5a3d9e70c3e6f7e6c10d38a9f9e1d29bfea7c026fe7c5329c5817267bf4b759d

Detection & response playbook

Typosquat
  1. Find it

    Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for cache-manager (version 7.2.10). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging cache-manager across your stack and pipelines.

  2. If you installed it — respond

    cache-manager is a typosquat — you almost certainly intended a legitimately-named package. Remove cache-manager, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.

  3. Did it already run?

    If cache-manager was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

  4. How O3 protects you

    O3 blocks cache-manager before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. cache-manager on npm has been identified as a malicious package (version 7.2.10 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-010973

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks cache-manager-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

Explore

cache-manager (npm) malicious package — MAL-2026-11523 | O3 Security