Which versions of middleware-jwt are malicious?

The following npm versions of middleware-jwt are flagged malicious: 1.0.0. Treat any of these as compromised.

How do I remediate middleware-jwt if I installed it?

Remove middleware-jwt from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

I already installed middleware-jwt — how do I know if it already compromised me?

If middleware-jwt was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Is middleware-jwt part of a known attack campaign?

Yes — middleware-jwt is associated with the GHSA-g9mr-rvmw-fg9c, IN-MAL-2026-008869 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find middleware-jwt across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for middleware-jwt (version 1.0.0).

Malicious package

middleware-jwtnpm

Advisory published Jun 16, 2026Updated Jul 8, 2026

middleware-jwt is a confirmed malicious npm package (MAL-2026-5888) that executes malicious code on install (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in middleware-jwt (npm)

MAL-2026-5888

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

npm uninstall middleware-jwt

What this malware does

The package was found to contain malicious code or consuming dependency that contains malicious code

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Malicious versions

1 flagged

1.0.0

Indicators of compromise (SHA-256)

f252b8db323bc480b88ccd8a11a15df419a56287c2ca2fc95200fd10d88e1251

32bc5304d92b1d80c7332d9177259c85486b3d272834f3a585a51aa44b7dac4c

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for middleware-jwt (version 1.0.0).
If you installed it — respond
Remove middleware-jwt from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If middleware-jwt was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. middleware-jwt on npm has been identified as a malicious package (version 1.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GHSA-g9mr-rvmw-fg9cIN-MAL-2026-008869

References

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks middleware-jwt-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database