CVE-2026-74899

jahlives openssl_encrypt

Published 17 Aug 2026 · updated 28 Aug 2026 · Analyzed

9.3 Critical · CVSS 4.0, vulncheck.com

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.

References

github.com/jahlives/openssl_encrypt/security/advisories/GHSA-m25m-ggxg-239c · Exploit, Mitigation, Vendor Advisory
www.vulncheck.com/advisories/openssl-encrypt-before-sandbox-escape-via-type-hierarchy · Third Party Advisory
github.com/siyuan-note/siyuan/security/advisories/GHSA-43jx-gxq4-jpjc · Not Applicable