🛡️ MAL-2026-12205 — simple-date-formatter-util-4

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Malicious code in simple-date-formatter-util-4 (npm)

Source: amazon-inspector

The package's npm postinstall script curls cloud instance-metadata endpoints (AWS 169.254.169.254, Alibaba 100.100.100.200, Tencent metadata.tencentyun.com and 169.254.0.23), retrieves the AWS IAM security-credentials for the attached instance role, lists /data/, and POSTs the collected output to a hardcoded attacker-controlled interact.sh (OAST) subdomain at ycrqyyjhwepdmhjifyccxss1hrks8lcd2.oast.fun. A bundled postinstall.js additionally reads the installer's ~/.ssh directory and POSTs username, platform, and key-file listings via HTTPS to the hardcoded IP 124.221.154.135:443/post. The declared package purpose (date formatting utility) has no relationship to cloud metadata queries or SSH-directory enumeration. Running npm install on this package hands short-lived IAM credentials and SSH material to the attacker.

Affected software

MAL-2026-12205 is recorded against 1 package.

  • simple-date-formatter-util-4

Timeline and source

Published on 5 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

www.npmjs.com (Package)
www.npmjs.com (Package)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-08-05
Updated 2026-08-12
Modified 2026-08-05
Fix URL N/A

Affected Packages

Software From version Fixed in
simple-date-formatter-util-4 — —

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