🛡️ MAL-2026-10116 — jwtmethod

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

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

www.npmjs.com (Package)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-07-10
Updated 2026-08-12
Modified 2026-07-10
Fix URL N/A

Affected Packages

Software From version Fixed in
jwtmethod

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