Which versions of solana-web3-alt are malicious?

The following PyPI versions of solana-web3-alt are flagged malicious: 0.37.0, 0.37.1. Treat any of these as compromised.

How do I remediate solana-web3-alt if I installed it?

solana-web3-alt 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 solana-web3-alt — how do I know if it already compromised me?

If solana-web3-alt 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 solana-web3-alt part of a known attack campaign?

Yes — solana-web3-alt is associated with the 2026-05-foundry-utils 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 solana-web3-alt across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for solana-web3-alt (2 malicious versions).

Malicious package

solana-web3-altPyPI

Advisory published May 18, 2026Updated May 18, 2026

solana-web3-alt is a confirmed malicious PyPI package (MAL-2026-3835) that steals credentials and exfiltrates sensitive data (malicious versions 0.37.0, 0.37.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in solana-web3-alt (PyPI)

MAL-2026-3835

Immediate action

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

pip uninstall solana-web3-alt

What this malware does

In specific environments, the package triggers silent code execution during installation. The code to execute is not included in the package.

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2026-05-foundry-utils

Reasons (based on the campaign):

dependency-confusion
other

Malicious versions

2 flagged

0.37.00.37.1

Indicators of compromise (SHA-256)

b3846bb2c80cb984e05f37cddc24548b73067be9aaca692e401a06f7c323e7b9

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for solana-web3-alt (2 malicious versions).
If you installed it — respond
solana-web3-alt 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 solana-web3-alt 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. solana-web3-alt on PyPI has been identified as a malicious package (versions 0.37.0, 0.37.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2026-05-foundry-utils

References

bad-packages.kam193.eu

Credits

Kamil Mańkowski (kam193) · reporter

Detect & block this

O3 blocks solana-web3-alt-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

All malware advisories How O3 detects malware Vulnerability database