jwtmethod (npm) · Malicious Code
Affects jwtmethodSource GCVE Database
Malicious package : remove jwtmethod and rotate any secrets on hosts that installed it.
Data as of 11 Jul 2026, 09:43 UTC
Malicious package
Published to npm · OSV MAL-2026-10116
What to do
Remove jwtmethod from every project, lockfile and image that pulls it in. Treat any host that installed it as compromised: rotate the credentials, tokens and keys it could read, from a clean machine.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| npmjwtmethod | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
--- _-= Per source details. Do not edit below this line.=-_ ## 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.