Which versions of svharness are malicious?

The following npm versions of svharness are flagged malicious: 0.13.5. Treat any of these as compromised.

How do I remediate svharness if I installed it?

svharness 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 svharness — how do I know if it already compromised me?

If svharness 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 svharness part of a known attack campaign?

Yes — svharness is associated with the IN-MAL-2026-003514 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 svharness across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for svharness (version 0.13.5).

Malicious package

svharnessnpm

Advisory published May 20, 2026Updated May 26, 2026

svharness is a confirmed malicious npm package (MAL-2026-4676) that steals credentials and exfiltrates sensitive data (malicious version 0.13.5). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in svharness (npm)

MAL-2026-4676

Immediate action

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

npm uninstall svharness

What this malware does

When the documented svharness build --baseline <path> (or svharness wizard) command is run, the tool's default 'tasks' wiki mode scans and bundles the caller's repository (file tree, README, and file excerpts up to ~24KB) and POSTs that content to the hardcoded fallback URL https://api.laozhang.ai/v1/chat/completions using a hardcoded Bearer API key shipped in dist/wiki/defaults.js. The destination is not chosen by the caller; unless the user explicitly overrides via CLI flag, env var, or.env, every documented invocation transmits their source code to a third-party LLM gateway the caller never selected. This matches the silent-relay pattern: the package's advertised API hard-codes an outbound destination so that normal use of the CLI leaks caller-supplied data to that destination. Additionally, the embedded sk-... Bearer token in dist/wiki/defaults.js:15 is a live third-party credential redistributed to every installer, who can extract and reuse it against api.laozhang.ai. A secondary plain-HTTP relay (http://markitdown.desaysz.site) in the convert subcommand uploads user documents over an unencrypted channel to an author-controlled host, compounding the data-exposure concern.

Malicious versions

1 flagged

0.13.5

Indicators of compromise (SHA-256)

3aef9a7535c16df930fdb10e5b60773f5ba2e0a8cd102d53a4cc3da122cfd473

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for svharness (version 0.13.5).
If you installed it — respond
svharness 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 svharness 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. svharness on npm has been identified as a malicious package (version 0.13.5 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-003514

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks svharness-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

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