🛡️ MAL-2026-10116 — jwtmethod
Description
Malicious code in jwtmethod (npm)
Source: amazon-inspector
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.
Affected software
MAL-2026-10116 is recorded against 1 package.
- jwtmethod
Timeline and source
Published on 10 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.
References
Details
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| jwtmethod | — | — |
References
More MAL 2026 advisories
Browse all of MAL 2026 in the advisory index.
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