registry / chaienv / 1.0.2

chaienv@1.0.2

OSV Malicious Advisory

imported 9d ago · by OpenSSF/OSV

OpenSSF/OSV advisory MAL-2026-17321 confirms this npm version as malicious. chaienv@1.0.2 is published as a small Chai environment helper, but its index.js unconditionally loads lib/config.js at require() time via `const { config } = require('./lib/config')`. lib/config.js is a 4,454,290-byte single-line module packed with obfuscator.io (RC4-decoded string array of roughly 26,000 entries), with no relation to the trivial no-op middleware the README advertises...

Advisory

MAL-2026-17321

Source

OpenSSF Malicious Packages via OSV

Summary

Malicious code in chaienv (npm)

Details

chaienv@1.0.2 is published as a small Chai environment helper, but its index.js unconditionally loads lib/config.js at require() time via `const { config } = require('./lib/config')`. lib/config.js is a 4,454,290-byte single-line module packed with obfuscator.io (RC4-decoded string array of roughly 26,000 entries), with no relation to the trivial no-op middleware the README advertises. The rest of lib/ ships verbatim pino internals (proto.js, multistream.js, levels.js, transport.js, worker.js, redaction.js, symbols.js) as decoys, the README CI badge and LICENSE point at github.com/pinojs/pino, and package.json bugs.url is jsonspack.com — none of which match the stated Chai-plugin purpose. Any consumer that imports this package executes the opaque 4.4MB blob on load; the package impersonates an unrelated well-known project's source tree to normalize the obfuscated sibling and bypass casual review.

Decision reason

OpenSSF Malicious Packages via OSV confirms chaienv@1.0.2 as malicious (MAL-2026-17321): Malicious code in chaienv (npm)

References

OSV advisory PACKAGE

Source & flagged code

0 flagged

No flagged code excerpts are attached to this scan.

Source & flagged code

0 flagged · loading source

No flagged code excerpts are attached to this scan.

Findings

1 High

HighOsv Malicious Advisory

Affected versions and remediation

This report applies to chaienv@1.0.2.

See version security history for other recorded verdicts.

Avoid installing chaienv@1.0.2. 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: 2026-09-30 05:00:07.912Z (UTC).

Source advisory published: 2026-09-30 04:09:36.000Z (UTC).

This report uses published external intelligence. The advisory does not provide a separate source-code analysis for each listed version.