CVE-2026-74899
Critical · 9.8CVSS
9.8
EPSS
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Published
Aug 17, 2026
CISA due date
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The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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