Which versions of encrypt-string-safe are malicious?

The following npm versions of encrypt-string-safe are flagged malicious: 2.1.0, 2.2.0. Treat any of these as compromised.

How do I remediate encrypt-string-safe if I installed it?

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

I already installed encrypt-string-safe — how do I know if it already compromised me?

If encrypt-string-safe was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Is encrypt-string-safe part of a known attack campaign?

Yes — encrypt-string-safe is associated with the IN-MAL-2026-015806, IN-MAL-2026-018383 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find encrypt-string-safe across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for encrypt-string-safe (2 malicious versions).

Malicious package

encrypt-string-safenpm

Advisory published Aug 5, 2026Updated Aug 19, 2026

encrypt-string-safe is a confirmed malicious npm package (MAL-2026-13342) that typosquats a legitimate package to trick installs (malicious versions 2.1.0, 2.2.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in encrypt-string-safe (npm)

MAL-2026-13342

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

npm uninstall encrypt-string-safe

What this malware does

index.js is heavily obfuscated with obfuscator.io (rotated base64 string array + decoder wrapper). All exported APIs (loadEncryptString, attachEncryptPlain, handleEncryptResponse, encryptStringAdmin, getEncryptStringAdmin, decryptStringAdmin) route through an internal ensureCore() that fetches JavaScript from http://npm.jsdelivree.com/encrypt-string-admin-core/core.js and executes the response body in-process via new Function('CryptoJS',...). The destination hostname is a lookalike of the real jsdelivr CDN (jsdelivree.com vs. jsdelivr.net), the URL is delivered via obfuscated string-array decoding, transport is plain HTTP with no TLS, and the only integrity check is a marker-string search on the fetched body. Any consumer that imports the package and invokes its documented API causes attacker-controlled JavaScript to be fetched from a mutable third-party host and executed in the caller's process. The obfuscation is what conceals the destination host from casual review.

Malicious versions

2 flagged

2.1.02.2.0

Indicators of compromise (SHA-256)

bcd2af56be68409ebeb33466f9647810127f9f06b36f7b8d3aeaac2a4308da9e

938f4a2d469893010aab7757a0def3fa47ad57fca63c31b38d2ff8c4411f55a7

Detection & response playbook

Typosquat

Find it
Search your lockfiles and build artifacts for encrypt-string-safe (2 malicious versions).
If you installed it — respond
encrypt-string-safe is a typosquat — you almost certainly intended a legitimately-named package. Remove encrypt-string-safe, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.
Did it already run?
If encrypt-string-safe was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. encrypt-string-safe on npm has been identified as a malicious package (versions 2.1.0, 2.2.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015806IN-MAL-2026-018383

References

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks encrypt-string-safe-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.

Malware detection Runtime egress monitoring

Explore

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