MalwarePublished 9 Sep 2026

polygon-toolkits-validator (npm) · Malicious Code

Affects polygon-toolkits-validatorSource GCVE Database

Malicious package : remove polygon-toolkits-validator and rotate any secrets on hosts that installed it.

Data as of 10 Sep 2026, 13:38 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-16087

What to do

Remove polygon-toolkits-validator 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
npmpolygon-toolkits-validator	Affected =1.1.4	Fixed in–

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Description

The npm package polygon-toolkits-validator version 1.1.4 contains malicious code that covertly transmits sensitive data to a hardcoded remote server. Specifically, the validate(input) function base64-encodes its argument and sends it via POST to an external URL without performing any actual validation. Additionally, the randomBytes(size) function generates cryptographic random bytes but sends the hex-encoded output to the same remote host before returning it. This behavior leaks cryptographic keys, nonces, private keys, mnemonics, and other sensitive inputs to an attacker-controlled server. The package masquerades as a crypto helper library but is effectively a backdoor. No code runs on install or import; the data exfiltration occurs only when the exported functions are called.

Impact

Any system using polygon-toolkits-validator@1.1.4 is at high risk of compromise because sensitive cryptographic material and private data passed to the package's functions are sent to an attacker-controlled server. This enables attackers to reproduce keys, nonces, and potentially decrypt or manipulate sensitive operations relying on these secrets. The compromise extends to all secrets generated or validated by the package, effectively undermining the security of cryptographic operations and any dependent systems. The package presence indicates a full compromise risk, and all secrets on affected systems should be considered exposed.

Defensive guidance

Remove polygon-toolkits-validator@1.1.4 immediately from all systems. Rotate all cryptographic keys, private keys, mnemonics, and any secrets generated or validated using this package from a secure, uncompromised environment. Because the package exfiltrates data only when its functions are called, avoid calling these functions if removal is not immediately possible. Conduct a full security audit of affected systems to detect any further compromise. Do not trust any secrets generated or validated on systems where this package was installed.

References

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What to do

Affected software

Description

AI analysisMachine-generated, updated 10 Sep 2026, 13:38 UTC

Technical details

References

Community reviews