MAL-2026-10116

    Dashboard / Malicious Package / MAL-2026-10116

    MAL-2026-10116

    Published: 10 Jul 2026Last Modified: 10 Jul 2026

    Summary: Malicious code in jwtmethod (npm)

    Details: Source: amazon-inspector (3dbd06d83019ce10a1c0da788fc10633f55f9f6c82058ca6841c4650b5611afb) On module load, jwtmethod's decode.js executes a top-level routine that performs an HTTPS GET to https://jsonkeeper.com/b/E69V3 and passes the response body to `new Function.constructor('require', errCode)`, then invokes the resulting function with the host's `require`. The fetched content is attacker-controlled (jsonkeeper.com is a mutable third-party paste host) and is executed with full Node capabilities, giving the attacker arbitrary code execution on the installer's machine the moment any consumer imports the package. Package metadata is forged to impersonate the auth0/jsonwebtoken ecosystem: package.json sets `author: auth0` and points `repository`/`bugs` at github.com/radix-ui/primitives, and README.md is the unrelated `react-text` documentation from radix-ui — a lure designed to entice installers looking for a JWT library.

    References: https://www.npmjs.com/package/jwtmethod/v/1.1.10

    Affected packages

    Package

    Name: jwtmethod

    Purl: pkg:npm/jwtmethod

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    1.1.10