Arbitrary Code Injection Affecting python3.14-freethreading-idle package, versions <0:3.14.4-2.el9_8


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.17% (38th percentile)

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  • Snyk IDSNYK-RHEL9-PYTHON314FREETHREADINGIDLE-16776209
  • published20 May 2026
  • disclosed20 Jan 2026

Introduced: 20 Jan 2026

CVE-2026-0865  (opens in a new tab)
CWE-74  (opens in a new tab)

How to fix?

Upgrade RHEL:9 python3.14-freethreading-idle to version 0:3.14.4-2.el9_8 or higher.
This issue was patched in RHSA-2026:19176.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3.14-freethreading-idle package and not the python3.14-freethreading-idle package as distributed by RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

User-controlled header names and values containing newlines can allow injecting HTTP headers.

CVSS Base Scores

version 3.1