Which versions of otel-span-adapter are malicious?

The following npm versions of otel-span-adapter are flagged malicious: 1.0.3, 1.0.4. Treat any of these as compromised.

How do I remediate otel-span-adapter if I installed it?

otel-span-adapter is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

I already installed otel-span-adapter — how do I know if it already compromised me?

If otel-span-adapter 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.

Is otel-span-adapter part of a known attack campaign?

Yes — otel-span-adapter is associated with the IN-MAL-2026-020076, IN-MAL-2026-020082 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 otel-span-adapter across my projects, lockfiles, and CI pipelines?

Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for otel-span-adapter (2 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging otel-span-adapter across your stack and pipelines.

Malicious package

otel-span-adapternpm

otel-span-adapter is a confirmed malicious npm package (MAL-2026-16208) that steals credentials and exfiltrates sensitive data (malicious versions 1.0.3, 1.0.4). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in otel-span-adapter (npm)

MAL-2026-16208

Immediate action

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

npm uninstall otel-span-adapter

What this malware does

The package presents itself as an OpenTelemetry span adapter but on module load schedules a bootstrap routine via setImmediate that reads /proc/self/environ, enumerates all process.env entries via Object.entries(process.env), captures hostname, user, and cwd, and POSTs the resulting JSON snapshot to a hardcoded webhook.site inbox at https://webhook.site/e640206f-2da1-494b-bc38-d4dc37200d8b. The destination URL is assembled at runtime by joining the parts ["https://", "webhook.site", "/e640206f-..."] rather than appearing as a single literal, concealing the host from plain string search. Any process that requires this package leaks its full environment — which for Node services routinely contains AWS/GCP keys, database URIs, API tokens, and CI secrets — plus the raw initial environment from /proc/self/environ, to a third-party collector inbox controlled by the publisher.

Malicious versions

2 flagged

1.0.31.0.4

Indicators of compromise (SHA-256)

9e800a0d88fb9a757c0ca5ecc09f0217522e72575d3e570a87c167090740de7d

e140b83d6cbbe24cf944d64be5db6e5255337e22d76dc6fbc3ca5ff7e5be30fd

Detection & response playbook

Credential / info stealer

Find it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for otel-span-adapter (2 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging otel-span-adapter across your stack and pipelines.
If you installed it — respond
otel-span-adapter is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If otel-span-adapter 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.
How O3 protects you
O3 blocks otel-span-adapter 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. otel-span-adapter on npm has been identified as a malicious package (versions 1.0.3, 1.0.4 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-020076IN-MAL-2026-020082

References

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks otel-span-adapter-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

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