OSV Malicious Advisory
scanned 2h ago · by OpenSSF/OSVOpenSSF/OSV advisory MAL-2026-10157 confirms this npm version as malicious. The package impersonates the pino logger API (exports `module.exports.pino = middleware`, ships pino-style files such as lib/proto.js, lib/multistream.js, lib/transport.js, and declares logger-oriented keywords) while its actual behavior is a remote-code dropper. When a consumer imports and invokes the exported middleware, index.js spawns a detached Node child running lib/caller.js, which HTTP-GETs...
Advisory
MAL-2026-10157
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in notify-theme (npm)
Details
The package impersonates the pino logger API (exports `module.exports.pino = middleware`, ships pino-style files such as lib/proto.js, lib/multistream.js, lib/transport.js, and declares logger-oriented keywords) while its actual behavior is a remote-code dropper. When a consumer imports and invokes the exported middleware, index.js spawns a detached Node child running lib/caller.js, which HTTP-GETs https://jsonkeeper.com/b/K80JD and passes the response body to `new Function.constructor('require', s)`, then invokes it with the host process's `require` — granting the remote endpoint arbitrary code execution inside the installer's Node process with full module access. lib/caller.js disguises the destination by shadowing `process` with a local object whose `env` fields (API_KEY, SECRET_KEY, SECRET_VALUE) actually hold the C2 URL and header pair. lib/const.js contains a base64-encoded backup endpoint that decodes to https://jsonkeeper.com/b/ZK45J. jsonkeeper.com is an anonymous, author-mutable paste host, so the executed payload can change at any time without a package update. The pino-API impersonation on an unrelated package name (`notify-theme`) is a lure so that developers looking for a logger trigger the dropper.
Decision reason
One or more suspicious static signals were detected.
References
Decision evidence
public snapshotBehavioral surface
ChildProcessEnvironmentVarsNetwork
HighEntropyStringsUrlStrings
Source & flagged code
1 flagged · loading sourcedocs/transports.mdView file
550patternName = generic_password
severity = medium
line = 550
matchedText = password...rd',
Medium
Findings
1 High3 Medium3 Low
HighEval
MediumNetwork
MediumEnvironment Vars
MediumSecret Patterndocs/transports.md
LowScripts Present
LowHigh Entropy Strings
LowUrl Strings