CVE-2026-90444

OS Command Injection in Malcolm

State
Published
Severity
8.7 High
Published
Sep 11, 2026
Updated
Oct 2, 2026
Reserved
Sep 11, 2026

Read the record on cve.org

Description

A file-transfer interface that requires valid credentials accepts attacker-controlled filenames without restricting shell metacharacters. An automated process later constructs and runs a system command using the uploaded file's name, allowing an authenticated attacker to embed and execute arbitrary operating system commands with the privileges of that process. This allows an attacker to read and modify ingested log data, and could provide a foothold for further movement within the internal network.

Scores

CVSSScoreVectorSource
4.08.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:Nicscert
3.18.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hicscert

Weaknesses

  • CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection')

Affected Products

ProductVersions
MalcolmCISA
  • before v26.06.0Affected
  • v26.06.0Not affected

References

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