CVE-2026-74896 openssl_encrypt before 1.4.0 Sandbox Escape via Dunder Attribute Traversal

Critical 9.3 Published 17 Aug 2026 Updated 1 Oct 2026

Attackers can escape the sandbox and execute arbitrary system commands by exploiting dunder attribute traversal in the AST analyzer.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2026-74896?

CVE-2026-74896 is a critical code injection vulnerability in Jahlives Openssl Encrypt, published on 17 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-693

Which versions are affected by CVE-2026-74896?

1 open source package ship an affected version, including openssl-encrypt. It affects 1 product.

Package	Affected	Fixed in
`openssl-encrypt` PyPI	All versions	`1.4.0`

Products include Jahlives Openssl Encrypt.

How do I fix CVE-2026-74896?

Upgrade openssl-encrypt to 1.4.0 or later.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2026-74896 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-74896 exists.

All Jahlives Openssl Encrypt vulnerabilities

Sources

Also known as GHSA-w7gr-9g4g-33mx, GHSA-xgx5-9hx8-gf84, PYSEC-2026-3771.