chai-as-testmode
This report shows the evidence for chai-as-testmode@1.4.7, 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 18d ago · by OpenSSF/OSVOpenSSF/OSV advisory MAL-2026-17473 confirms this npm version as malicious.
Advisory
MAL-2026-17473
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in chai-as-testmode (npm)
Details
The package masquerades as the pino logging library (README badges and lib/ contents mimic pino) but ships a dropper at lib/initializeCaller.js. A self-executing IIFE POSTs the full process.env object to a base64-concealed endpoint that decodes to https://ipcheck-hashed.vercel.app/api/auth/b4dadd6a26d820d08596, using an 'x-secret-header: secret' header, and then passes the HTTP response body to new Function('require', response.data) with require handed in — executing attacker-returned JavaScript in the installer's Node process. The transmitted payload is the entire environment (not a single named variable), which on developer and CI machines typically includes NPM_TOKEN, GITHUB_TOKEN, AWS_* credentials, and other CI secrets. The destination URL is stored base64-encoded to conceal it from casual inspection, and the typosquat-style package name together with pino-themed documentation form a cover story for the dropper.
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-testmode@1.4.7.
The versions list below shows the verdict for each recorded version.
- Avoid installing chai-as-testmode@1.4.7. 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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