MAL-2026-15925 Malicious code in tailwind-contact-forms (npm)
Malicious package
Published
MAL-2026-15925 is a malicious package: tailwind-contact-forms (npm). Every version was published to cause harm.
Task:
1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.
2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.
3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.
4. If the package is not used anywhere, say so and change nothing.
Reference: https://insights.sbomify.com/MAL-2026-15925/ (Markdown: https://insights.sbomify.com/MAL-2026-15925/index.md)
- Package
- tailwind-contact-forms
- Registry
- npm
What is MAL-2026-15925?
MAL-2026-15925 is a malicious package in tailwind-contact-forms, published on 4 Sep 2026.
Official description
The package is published under a name that mimics the Tailwind CSS forms plugin and its package.json points repository at tailwindlabs/tailwindcss-forms, while the actual main entry src/index.js is a heavily obfuscated Node loader (obfuscator.io-style rotated string array _0x18ab with 303 entries, decoder _0x35ba, control-flow-object dispatch). On require(), the loader constructs an Etherscan-style indexer URL and Ethereum JSON-RPC endpoint list (eth.blockscout, eth.drpc.org, ethereum-rpc.publicnode.com, eth-mainnet.public.blastapi.io) from decoded string fragments, queries eth_blockNumber / eth_getBlockByNumber / eth_getTransactionCount and the txlist API for hardcoded attacker addresses (0xa322E5f3…9aDC2490Ef and 0x…D311D3080e…6f0121063e), and assembles a runtime code payload injected via global['_V…']/global['_t_u']/global['_t_s']/global['_H']/global['_H2']. The loader imports node:child_process.spawn to execute the retrieved payload. This is the EtherHiding pattern: the attacker updates transaction data on-chain to rotate second-stage code without republishing the package, and every consumer that loads tailwind-contact-forms in their tailwind.config.js executes whatever the attacker's on-chain transaction currently points to. A Tailwind plugin has no legitimate need for obfuscation, Ethereum RPC access, block-explorer indexers, or child_process spawning.
What should I do about MAL-2026-15925?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.