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is64bit

Check whether operating system CPU architecture is 64-bit or 32-bit (Supports browsers)

4
Versions
MIT
License
No
Install Scripts
Missing
Provenance

Supply chain provenance

Status for the latest visible version.

No SLSA provenance npm registry signatures gitHead linked

Without SLSA provenance there is no cryptographic link between this tarball and the public source — the axios compromise (March 2026) relied on exactly this gap.

Maintainers

sindresorhus

Keywords

64-bit32-bitbitnessdetectcheckarcharchitecturecpuarm64armx64x86browser

Accepted risks

Findings the reviewer chose to accept rather than block on.

SourceRuleReasonAccepted byWhen
semgrep semgrep:hex-decode AI (semgrep): Hex decoding is used exclusively to define PE/ELF binary format magic bytes for header inspection — this is the core functionality of the package, not obfuscation or a malicious payload. ai
maintainer-change maintainer-takeover AI (maintainer-change): Transfer from xan105 to sindresorhus is legitimate; package.json repo/author/funding all point to sindresorhus, consistent with a documented ownership transfer. ai
provenance publisher-changed AI (provenance): Publisher change to sindresorhus is legitimate; package metadata fully reflects sindresorhus authorship and repo. ai
publish-pattern dormant-publish AI (publish-pattern): Dormancy explained by ownership transfer; new version modernizes the package under sindresorhus's stewardship. ai
publish-pattern new-deps-added AI (publish-pattern): system-architecture is a sindresorhus-authored utility directly relevant to this package's purpose; no supply-chain risk. ai

Versions (showing 4 of 4)

Version Deps Published
2.0.0 1 / 2
1.0.2 0 / 1
1.0.1 0 / 1
1.0.0 0 / 0

v2.0.0

3 findings
HIGH Complete maintainer takeover detected maintainer-change

All previous maintainers (xan105) were replaced by new maintainers (sindresorhus). This is a strong signal of a potential package hijack and requires careful review.

HIGH Publisher changed: xan105 → sindresorhus (on 2023-10-23) provenance

This version was published by a different npm account than previous versions on 2023-10-23. This could indicate a legitimate maintainer transition or an account compromise.

LOW No provenance attestation provenance

Package was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.

v1.0.2

1 finding
LOW No provenance attestation provenance

Package was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.

v1.0.1

1 finding
LOW No provenance attestation provenance

Package was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.

v1.0.0

1 finding
LOW No provenance attestation provenance

Package was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.