TinyZero up to 2025-58-24 HDFS File os.system os command injection

Summaryinfo

A vulnerability classified as critical was found in TinyZero up to 2025-58-24. Affected is the function os.system of the component HDFS File Handler. Executing a manipulation can lead to os command injection. This vulnerability is handled as CVE-2026-31226. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in TinyZero up to 2025-58-24. It has been declared as critical. This vulnerability affects the function os.system of the component HDFS File Handler. The manipulation with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The TinyZero project thru commit 6652a63c57fa7e5ccde3fc9c598c7176ff15b839 (2025-58-24) contains a critical command injection vulnerability (CWE-78) in its HDFS file operation utilities. The vulnerability arises from the unsafe construction and execution of shell commands via os.system() without proper input sanitization or escaping. User-controlled input (such as file paths) is directly interpolated into shell command strings using f-strings within the _copy() function. An attacker can inject arbitrary OS commands by supplying a specially crafted path parameter through the Hydra configuration framework. This leads to remote code execution with the privileges of the user running the TinyZero training process.

This vulnerability was named CVE-2026-31226 since 03/09/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 05/20/2026). The MITRE ATT&CK project declares the attack technique as T1202.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Name

• TinyZero

Version

• 2025-58-24

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CPE 2.2info

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