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CVE-2026-74899 Details

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.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-43jx-gxq4-jpjc	CISA-ADP	Not Applicable
https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-m25m-ggxg-239c	[email protected]	ExploitMitigationVendor Advisory
https://www.vulncheck.com/advisories/openssl-encrypt-before-sandbox-escape-via-type-hierarchy	[email protected]	Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-95	Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')	[email protected]

Affected Products

Product	Versions
jahlives openssl encrypt	< 1.4.0
CPE cpe:2.3:a:jahlives:openssl_encrypt::::::python::* Remediation No remediation found in references.

Change History

3 change records found show changes

Date	Action	Recorded By
Aug 28, 2026	Initial Analysis	[email protected]
Aug 18, 2026	CVE Modified	CISA-ADP
Aug 17, 2026	New CVE Received	[email protected]