therdweb
This report shows the evidence for therdweb@0.0.8, the only known version.
OpenSSF/OSV Malicious Advisory
imported 4mo ago · by OpenSSF/OSVOpenSSF/OSV advisory MAL-2026-6342 confirms this npm version as malicious.
Advisory
MAL-2026-6342
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in therdweb (npm)
Details
The package's name 'therdweb' is a one-character variation of the popular 'thirdweb' SDK, while its contents (README, source code, author field 'Michael Mclaughlin', repository URL pointing at MikeMcl/big.js, version banner '7.0.1') are copied verbatim from the unrelated big.js library — the publisher is not the original author of either project. Both shipped entrypoints, big.js and big.mjs, contain an injected try/catch block that performs `require("parket-slot")` and immediately invokes `doc.from_str()` on it at module load, with the catch block left empty to swallow errors. `parket-slot` is not listed in `package.json` dependencies and is not mentioned in the README (which falsely claims 'No dependencies'); package.json additionally declares an undocumented dependency `log-taker@^0.0.9`. Any consumer that imports or requires this package will execute code from these external, undeclared/hidden modules controlled by the same actor, while the README hides their existence. This is the loader half of a multi-package install-graph dropper paired with name-confusion against thirdweb and identity impersonation of big.js.
## Source: ghsa-malware (3a71ff401b8ca3f61c6dcb8b5ea46adbda1fc6eb03e773757cadae905c02dce8) 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.
References
Source & flagged code
0 flagged · loading sourceNo flagged code excerpts are attached to this scan.
Findings
1 High
HighOsv Malicious Advisory
Affected versions and remediation
This report applies to therdweb@0.0.8.
The versions list below shows the verdict for each recorded version.
- Avoid installing therdweb@0.0.8. Remove it from direct dependencies and check your lockfile for transitive copies.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
- If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.
Evidence last updated: .
Source advisory published: .
This report uses published external intelligence. The advisory does not provide a separate source-code analysis for each listed version.
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