CVE-2026-74896 describes a protection mechanism failure in the jahlives openssl_encrypt library prior to version 1.4.0. The vulnerability arises from the DangerousPatternVisitor AST analyzer's inability to detect traversal of dunder (double underscore) attributes, such as __class__, __bases__, __subclasses__(), and __globals__. Exploiting this, an attacker can escape the sandbox environment and execute arbitrary system commands by chaining these attributes within plugin code. This represents a critical security flaw with a CVSS 4.0 base score of 9.3, indicating high impact and ease of exploitation without privileges or user interaction.

Successful exploitation allows an unauthenticated attacker to bypass sandbox restrictions and execute arbitrary system commands on the host running the vulnerable openssl_encrypt plugin code. This can lead to full system compromise, data loss, or further attacks within the environment.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been documented at this time. Users should monitor the vendor's communications for updates and avoid running untrusted plugin code until a fix is available.