CVE-2026-74899
openssl_encrypt before 1.4.0 Sandbox Escape via Type Hierarchy
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-95 |
| Vendor | jahlives |
| Product | openssl_encrypt |
| Published | Aug 17, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
jahlives / openssl_encrypt
0 < 1.4.0