CRITICALVulnerability
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NVD CRITICAL: CVE-2026-74899 — openssl_encrypt versions before 1.4.0 contain a sandbox escape vulnerability in ...

·Source: NIST NVD

Updated:

Executive Summary

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.

Analysis

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. CVSS Score: 9.8. Published: 2026-08-17T11:16:44.917.

Indicators of Compromise (1)

CVE (1)
CVE-2026-74899
NVDMITRE CVE
Source Attribution

Originally published by NIST NVD on Aug 17, 2026. Verified by: NIST.

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