CVE
CVE-2026-74899
openssl_encrypt before 1.4.0 Sandbox Escape via Type Hierarchy
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.
Package Versions Affected
Package Version
patch Availability
No items found.
Automatically patch vulnerabilities without upgrading
Fix Without Upgrading
Detect compatible fix
Apply safe remediation
Fix with a single pull request
CVSS Version
Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.3
-
4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
C
H
U
0
-
C
H
U
-
Related Resources
No items found.
References
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74899.json, https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-m25m-ggxg-239c, https://nvd.nist.gov/vuln/detail/CVE-2026-74899, https://www.vulncheck.com/advisories/openssl-encrypt-before-sandbox-escape-via-type-hierarchy, https://github.com/siyuan-note/siyuan/security/advisories/GHSA-43jx-gxq4-jpjc