chai-as-precision
This report shows the evidence for chai-as-precision@7.0.6, the only known version.
This package appears in our research on the fake chai plugin campaign, with how it works, the full package list and what to do if you installed it.
OpenSSF/OSV Malicious Advisory
imported 3mo ago · by OpenSSF/OSVOpenSSF/OSV advisory MAL-2026-10219 confirms this npm version as malicious.
Advisory
MAL-2026-10219
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in chai-as-precision (npm)
Details
Package is published as `chai-as-precision` but its shipped code mimics `pino` (exports `middleware.pino`, ships `pino.js`/`proto.js`/`redaction.js`), a name/purpose mismatch consistent with typosquatting or masquerade for transitive installation. When the exported middleware is invoked, `index.js` spawns `node lib/initializeCaller.js` with `detached: true`, `stdio: 'ignore'`, and `child.unref()`, decoupling the child from the parent and suppressing output. `lib/initializeCaller.js` shadows `process` with a local object whose `DEV_API_KEY` is a base64 blob decoding to `https://tomato-brunhilda-40.tiiny.site/index.json`, GETs that URL, and executes the returned `cookie` field via `new Function.constructor('require', response)(require)` — arbitrary attacker-controlled JavaScript is executed with full `require` access on the host running the middleware. The destination is an anonymous tiiny.site host unrelated to any documented purpose, the URL and custom auth header are base64-hidden behind a fake env-var wrapper, and the executed content is mutable and controlled by whoever owns the tiiny.site page.
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 chai-as-precision@7.0.6.
The versions list below shows the verdict for each recorded version.
- Avoid installing chai-as-precision@7.0.6. 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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