Which versions of typescript-base58 are malicious?

The following npm versions of typescript-base58 are flagged malicious: 1.0.0. Treat any of these as compromised.

How do I remediate typescript-base58 if I installed it?

typescript-base58 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 typescript-base58 — how do I know if it already compromised me?

If typescript-base58 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 typescript-base58 part of a known attack campaign?

Yes — typescript-base58 is associated with the GHSA-rff8-755c-wqvw, IN-MAL-2026-008997 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 typescript-base58 across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for typescript-base58 (version 1.0.0).

Malicious package

typescript-base58npm

Advisory published Jul 7, 2026Updated Jul 8, 2026

typescript-base58 is a confirmed malicious npm package (MAL-2026-6925) that steals credentials and exfiltrates sensitive data (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in typescript-base58 (npm)

MAL-2026-6925

Immediate action

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

npm uninstall typescript-base58

What this malware does

[email protected] is a one-line re-export of the 'base58-core' package. The README advertises 'Zero dependencies' while package.json declares a runtime dependency on base58-core (^1.0.0), so installing this package silently introduces base58-core into the installer's dependency tree under a misleading description. The shim itself performs no install-time or import-time actions beyond the re-export; it contains no lifecycle scripts, no network calls, no credential reads, and no obfuscation. The installer-side risk is entirely contingent on the contents of base58-core, which is not analyzed in this record.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Malicious versions

1 flagged

1.0.0

Indicators of compromise (SHA-256)

708b684b07609cc682ab46f7ff27ba555b8086a09e4876341485c1f0143b3b39

b860a9c4960f55c236ca5e14781f5dcfb60752d4367cb9aeb30762d3b023004e

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for typescript-base58 (version 1.0.0).
If you installed it — respond
typescript-base58 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 typescript-base58 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. typescript-base58 on npm has been identified as a malicious package (version 1.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GHSA-rff8-755c-wqvwIN-MAL-2026-008997

References

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks typescript-base58-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