CVE-2026-74896

CRITICAL 9.8

openssl_encrypt before 1.4.0 Sandbox Escape via Dunder Attribute Traversal

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

openssl_encrypt versions before 1.4.0 contain a sandbox escape vulnerability in the DangerousPatternVisitor AST analyzer that fails to detect dunder attribute traversal techniques. Attackers can use __class__, __bases__, __subclasses__(), and __globals__ chains to access restricted functions and execute arbitrary system commands from plugin code.

CWE	CWE-693
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

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-w7gr-9g4g-33mx vulncheck.com: https://www.vulncheck.com/advisories/openssl-encrypt-before-sandbox-escape-via-dunder-attribute-traversal