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The shlex crate before version 1.2.1 for Rust contains a security vulnerability that allows unquoted and unescaped instances of the { and \xa0 characters, which may facilitate command injection. The vulnerability was discovered and disclosed on July 27, 2025, and received its initial analysis from NIST on August 7, 2025 (NVD).
The vulnerability has received varying CVSS severity assessments. NIST's NVD assigned a CVSS v3.1 Base Score of 9.8 (CRITICAL) with vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, while MITRE assessed it with a Base Score of 3.2 (LOW) with vector CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N. The vulnerability is classified under CWE-116 (Improper Encoding or Escaping of Output) (NVD).
The vulnerability can lead to command injection attacks, potentially resulting in the execution of attacker-controlled commands and arbitrary code execution (Red Hat).
Users should upgrade to shlex crate version 1.2.1 or later to address this vulnerability (NVD).
Source: This report was generated using AI
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