Which versions of bnpl-core are malicious?

The following npm versions of bnpl-core are flagged malicious: 35.8.2. Treat any of these as compromised.

How do I remediate bnpl-core if I installed it?

Remove bnpl-core from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

I already installed bnpl-core — how do I know if it already compromised me?

If bnpl-core 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 bnpl-core part of a known attack campaign?

Yes — bnpl-core is associated with the IN-MAL-2026-015352 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 bnpl-core across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for bnpl-core (version 35.8.2).

Malicious package

bnpl-corenpm

Advisory published Aug 5, 2026Updated Aug 5, 2026

bnpl-core is a confirmed malicious npm package (MAL-2026-13023) that executes malicious code on install (malicious version 35.8.2). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in bnpl-core (npm)

MAL-2026-13023

Immediate action

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

npm uninstall bnpl-core

What this malware does

index.js unconditionally requires./setup on load. setup.js constructs Cloudflare Workers hostnames via string-splitting array joins (e.g. oob-worker.cf102-baf.workers.dev, cf100-416, cf99-9b3, cf101-adf under workers.dev) and, if HTTPS fetches fail, retrieves a base64-chunked payload over DNS TXT records under *.dl.wel1.ru. The downloaded bytes are written to /var/tmp or %TEMP% under names masquerading as system tooling (dotnet_diag_<hex>.exe,.cache_<hex>), chmodded 0755 on POSIX, and spawned detached via cmd.exe /c start /b or /bin/sh -c. A TTL lock file at /tmp/.analytics_state throttles re-execution. package.json advertises a 'core runtime' with an empty dependency set and a trivial BnplCore init/version/configure surface as a cover story; DISABLE_TELEMETRY-style env checks reinforce the disguise. The host is anonymous Cloudflare Workers infrastructure with no publisher relationship, the fetch is unpinned and unverified, and the payload is opaque.

Malicious versions

1 flagged

35.8.2

Indicators of compromise (SHA-256)

b442dc0fb7678cca56e085cb17e0a3e5729eafc9fa34409f704fdcf5822a4efc

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for bnpl-core (version 35.8.2).
If you installed it — respond
Remove bnpl-core from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If bnpl-core 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. bnpl-core on npm has been identified as a malicious package (version 35.8.2 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015352

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks bnpl-core-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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