CVE-2026-74899

CriticalCVSS 9.8/10Last modified Aug 28, 2026

Description

openssl_encrypt versions before 1.4.0 contain a sandbox escape vulnerability in IsolatedPluginExecutor that exposes Python type objects in restricted exec() builtins. Attackers can traverse the Python class hierarchy via __class__.__mro__.__subclasses__() to access system functions and execute arbitrary OS commands.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-95

Affected software

No affected versions have been published.

Timeline

Published: Aug 17, 2026
Last modified: Aug 28, 2026
NVD status: Analyzed

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