🛡️ MAL-2026-12195 — simple-date-formatter-new-3

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

Description

Malicious code in simple-date-formatter-new-3 (npm)

Source: amazon-inspector

The package's postinstall script in package.json runs a shell pipeline that collects host and container-runtime information (kernel version via uname -r, /proc/1/cmdline, /proc/1/ns, root filesystem listing, block device listing) and POSTs the output via curl to the hardcoded interact.sh-style callback http://safjhdvsfwzhieemkdzbgr54r0yjhrmok.oast.fun/escinfo7. The same pipeline attempts container-escape actions: creating a cgroup subtree under /sys/fs/cgroup/esc7, moving PID 0 into it, mknoding a block device at /tmp/x17, and mounting the host root filesystem at /tmp/hostroot, with results reported back to the same external endpoint. The tarball also ships a postinstall.js that enumerates the installer's ~/.ssh directory and POSTs the listing plus username/platform to the hardcoded IP 124.221.154.135:443/post, with in-source comments describing the behavior as SSH-key C2 exfiltration. All of this runs automatically on npm install with no user consent. The package name and stated purpose ("date formatter") do not match any of the observed behavior.

Affected software

MAL-2026-12195 is recorded against 1 package.

  • simple-date-formatter-new-3

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)

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-new-3 — —

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