Which versions of tailwindcss-setflex are malicious?

Every published version of tailwindcss-setflex on npm is considered malicious. Remove the package entirely.

How do I remediate tailwindcss-setflex if I installed it?

Remove tailwindcss-setflex 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 tailwindcss-setflex — how do I know if it already compromised me?

If tailwindcss-setflex was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

Is tailwindcss-setflex part of a known attack campaign?

Yes — tailwindcss-setflex is associated with the GHSA-rf9v-4rc9-33wg 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 tailwindcss-setflex across my projects, lockfiles, and CI pipelines?

Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for tailwindcss-setflex (all published versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging tailwindcss-setflex across your stack and pipelines.

Malicious package

tailwindcss-setflexnpm

Malicious code in tailwindcss-setflex (npm) Remove it immediately and rotate any exposed credentials.

MAL-2025-190497

Immediate action

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

npm uninstall tailwindcss-setflex

What this malware does

The package tailwindcss-setflex was found to contain 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

all versions

Every published version of this package is considered malicious — remove it entirely.

Indicators of compromise (SHA-256)

f468f4113c3447f9ae79f630e3ebcf3245683c5f08c0e720e1ae2f57c7c6d77a

3d80169fb6c203bac400f4a79925a5a54eef1ef740164552a568e6e6604f9427

Detection & response playbook

Malicious package

Find it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for tailwindcss-setflex (all published versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging tailwindcss-setflex across your stack and pipelines.
If you installed it — respond
Remove tailwindcss-setflex 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 tailwindcss-setflex was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks tailwindcss-setflex before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. tailwindcss-setflex on npm has been identified as a malicious package (all published versions flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GHSA-rf9v-4rc9-33wg

References

github.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks tailwindcss-setflex-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