MalwarePublished 13 Nov 2026

axon-web (npm) · Malicious Code

Affects axon-webSource GCVE Database

Malicious package : remove axon-web and rotate any secrets on hosts that installed it.

Data as of 13 Nov 2026, 07:58 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-19222

What to do

Remove axon-web 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
npmaxon-web	Affected =12.0.0	Fixed in–

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Description

The axon-web npm package version 12.0.0 contains malicious code that, upon loading, automatically collects the host's internal hostname and user environment variables and sends this information via a DNS query to a third-party out-of-band listener domain (oast.fun). This behavior occurs without any user interaction and exposes sensitive internal host and user identity information to an external party. The package masquerades as a dependency-confusion proof-of-concept but acts as a data exfiltration vector.

Impact

The malicious package leaks sensitive internal host and user identity information to an external attacker-controlled domain via DNS queries. This can lead to exposure of internal network details and user account names, potentially aiding further targeted attacks or reconnaissance. The exfiltration occurs silently and automatically when the package is loaded, increasing the risk of unnoticed data leakage in development or build environments.

Defensive guidance

Users should avoid using axon-web version 12.0.0 from public npm sources, especially in environments where internal hostnames and user information must remain confidential. Replace or remove this package and verify that internal packages are correctly resolved to prevent dependency confusion. Monitor DNS queries for unexpected resolutions to external domains such as oast.fun to detect potential data exfiltration attempts.

Summary

The axon-web npm package version 12.0.0 includes malicious code that executes immediately upon requiring the module. It reads the host's internal hostname and user environment variables (USER or USERNAME), encodes these into a subdomain of an external domain controlled by an attacker (oast.fun), and performs a DNS resolution query to transmit this information out-of-band. This DNS query leaks internal hostnames and account names from build systems or developer machines that mistakenly resolve this public npm package instead of an intended internal package with the same name. This behavior is automatic and requires no explicit action by the user beyond loading the module.

References

npmjs.com/package/axon-web/v/12.0.0 (opens in a new tab)

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What to do

Affected software

Description

AI analysisMachine-generated, updated 13 Nov 2026, 07:58 UTC

Technical details

References

Community reviews