Sandbox Escape Vulnerability in OpenSSL_Encrypt from GitHub
CVE-2026-74899

9.3CRITICAL

Key Information:

Vendor

Jahlives

Status
OpenSSL Encrypt
Vendor
CVE Published:
17 August 2026

What is CVE-2026-74899?

OpenSSL_Encrypt versions prior to 1.4.0 are affected by a sandbox escape vulnerability in IsolatedPluginExecutor. This flaw allows attackers to traverse the Python class hierarchy through class.mro.subclasses(), granting access to restricted exec() builtins. As a result, malicious users can exploit this vulnerability to execute arbitrary OS commands, posing a significant threat to system integrity and security.

Affected Version(s)

openssl_encrypt 0 < 1.4.0

openssl_encrypt 1.4.0

References

https://github.com/jahlives/openssl_encrypt/security/advi...
vendor-advisory
https://www.vulncheck.com/advisories/openssl-encrypt-befo...
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.