pako
zlib port to javascript - fast, modularized, with browser support
Supply chain provenance
Status for the latest visible version.
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
Keywords
Accepted risks
Findings the reviewer chose to accept rather than block on.
| Source | Rule | Reason | Accepted by | When |
|---|---|---|---|---|
| npm-metadata | suspicious-initial-version | AI (npm-metadata): pako 0.0.0 is the legitimate first release of a 12-year-old zlib library; the 0.0.0 version is not indicative of malicious intent for this established package. | ai | |
| semgrep | semgrep:dynamic-require | AI (semgrep): Dynamic require is in benchmark/benchmark.js, a dev-only benchmarking tool that loads impl files for comparison. Not runtime code and not a security concern. | ai | |
| semgrep | semgrep:shady-links-raw-ip | AI (semgrep): The 127.0.0.1 reference is in Gruntfile.js as a localhost test server URL for browser testing — a standard dev tooling pattern, not a malicious endpoint. Stable false positive for this package. | ai | |
| typosquat | typosquat.levenshtein:pino | AI (typosquat): pako is a well-established zlib compression library; name similarity to 'pino' (a logging library) is purely coincidental with no impersonation intent. Stable false positive for this package. | ai |
Versions (showing 31 of 31)
| Version | Deps | Published |
|---|---|---|
| 2.1.0 | 0 / 13 | |
| 2.0.4 | 0 / 13 | |
| 2.0.3 | 0 / 13 | |
| 2.0.2 | 0 / 13 | |
| 2.0.1 | 0 / 13 | |
| 2.0.0 | 0 / 13 | |
| 1.0.11 | 0 / 11 | |
| 1.0.10 | 0 / 11 | |
| 1.0.9 | 0 / 11 | |
| 1.0.8 | 0 / 10 | |
| 1.0.7 | 0 / 15 | |
| 1.0.6 | 0 / 15 | |
| 1.0.5 | 0 / 18 | |
| 1.0.4 | 0 / 15 | |
| 1.0.3 | 0 / 15 | |
| 1.0.2 | 0 / 15 | |
| 1.0.1 | 0 / 15 | |
| 1.0.0 | 0 / 15 | |
| 0.2.9 | 0 / 15 | |
| 0.2.8 | 0 / 15 | |
| 0.2.7 | 0 / 15 | |
| 0.2.6 | 0 / 14 | |
| 0.2.5 | 0 / 14 | |
| 0.2.4 | 0 / 14 | |
| 0.2.3 | 0 / 14 | |
| 0.2.2 | 0 / 15 | |
| 0.2.1 | 0 / 15 | |
| 0.2.0 | 0 / 15 | |
| 0.1.1 | 0 / 15 | |
| 0.1.0 | 0 / 15 | |
| 0.0.0 | 0 / 5 |
v2.0.4
1 findingPackage was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.
v2.0.3
1 findingPackage was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.
v2.0.2
1 findingPackage was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.
v2.0.1
1 findingPackage was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.
v2.0.0
1 findingPackage was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.
v1.0.10
1 findingPackage was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.
v1.0.9
1 findingPackage was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.
v1.0.8
1 findingPackage was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.
v1.0.7
1 findingPackage was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.
v1.0.6
1 findingPackage was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.
v1.0.5
1 findingPackage was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.
v1.0.4
1 findingPackage was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.
v1.0.3
1 findingPackage was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.
v1.0.2
1 findingPackage was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.
v1.0.1
1 findingPackage was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.
v1.0.0
1 findingPackage was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.
v0.2.9
1 findingPackage was published without Sigstore provenance. Consider requesting the maintainer enable provenance via CI/CD.
v0.2.8
1 findingPackage was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.
v0.2.7
1 findingPackage was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.
v0.2.6
1 findingPackage was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.
v0.2.5
1 findingPackage was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.
v0.2.4
1 findingPackage was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.
v0.2.3
1 findingPackage was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.
v0.2.2
1 findingPackage was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.
v0.2.1
1 findingPackage was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.
v0.2.0
1 findingPackage was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.
v0.1.1
1 findingPackage was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.
v0.1.0
1 findingPackage was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.
v0.0.0
1 findingPackage was published without Sigstore provenance. Only ~12% of npm packages have provenance, so this is common but not ideal.