RCE in N/a

CVE-2026-31226

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.

Vulnerability class: Command Injection (OS Command Injection)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.021 (81.3th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 81.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-31226: rose from 0.012 to 0.021.

EPSS over last 30 days · oldest: 0.012 · newest: 0.021 · change: +0.010

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-31226?
CVE-2026-31226 is a critical-severity vulnerability in N/a, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-05-12.
How severe is CVE-2026-31226?
Critical severity. CVSS v3 base score is 9.8 out of 10.