CVE-2026-74899

PYSEC-2026-3727 · CVE-2026-74899

Published Aug 17, 2026 · Modified Aug 29, 2026

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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

ADVISORY https://github.com/siyuan-note/siyuan/security/advisories/GHSA-43jx-gxq4-jpjc
ADVISORY https://www.vulncheck.com/advisories/openssl-encrypt-before-sandbox-escape-via-type-hierarchy
EVIDENCE https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-m25m-ggxg-239c

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CVE-2026-74899

Description

References

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