MalwarePublished 5 Aug 2026Updated 24 Sep 2026

@sapappgyver/appgyver-descriptors (npm) · Malicious Code

Affects @sapappgyver/appgyver-descriptorsSource GCVE Database

Malicious package : remove @sapappgyver/appgyver-descriptors and rotate any secrets on hosts that installed it.

Data as of 26 Oct 2026, 16:15 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-12507

What to do

Remove @sapappgyver/appgyver-descriptors 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
npm@sapappgyver/appgyver-descriptors	Affected =9.9.11 =9.9.0	Fixed in–

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Description

The npm package @sapappgyver/appgyver-descriptors version 9.9.11 contains malicious code that executes during installation and when required by other modules. It collects the installer's OS username, hostname, and current working directory, then exfiltrates this information via DNS queries to an attacker-controlled domain. The package name mimics a legitimate SAP package scope to deceive users. Installation of this package can lead to full system compromise, and all secrets on the affected system should be considered exposed.

Impact

Installation or use of this package results in leakage of sensitive host information to an attacker-controlled domain, potentially enabling further compromise. The package's presence indicates a full system compromise, with the attacker potentially having control over the affected machine. All secrets and keys stored on the compromised system should be considered exposed and require immediate rotation. Removing the package alone does not guarantee removal of all malicious artifacts or backdoors.

Defensive guidance

The package should be immediately removed from all systems. All secrets, credentials, and keys stored on affected machines must be rotated from a secure, uncompromised environment. Due to the high risk of full system compromise, affected systems should be thoroughly audited and potentially rebuilt to ensure removal of all malicious components.

Summary

The malicious npm package @sapappgyver/appgyver-descriptors (version 9.9.11) includes an install lifecycle script that runs node index.js, which requires lib/core.js. This core module collects sensitive environment information such as the OS username, hostname, and current working directory basename. It encodes these details into a DNS subdomain and performs a DNS A record lookup to an attacker-controlled domain (oob.sl4x0.xyz), effectively leaking host and user identity. The code obfuscates module and property names using arrays of character code hex literals reconstructed at runtime. The package name is crafted to visually resemble SAP's legitimate @sap/appgyver-* scope, but the repository and author email are unrelated to SAP, indicating a malicious intent. According to the source ghsa-malware, any system with this package installed should be considered fully compromised.

References

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What to do

Affected software

Description

AI analysisMachine-generated, updated 14 Aug 2026, 19:52 UTC

Technical details

References

Community reviews