by Kastro
Paper/Archive/CVE-2026-74899

CVE-2026-74899

jahlives openssl_encrypt — openssl_encrypt before 1.4.0 Sandbox Escape via Type Hierarchy

EPSS 0.8%public exploitCVSS 9.8
critical.is priorityof 100
50
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 54.9.549 × 2011.0Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
openssl_encrypt< 1.4.01.4.0CNA

Scores by source

VulnCheck (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

advisorygithub.com/jahlives/openssl_encrypt/security/advisories/GHSA-m25m-ggxg-239cwriteupvulncheck.com/advisories/openssl-encrypt-before-sandbox-escape-via-type-hierarchyexploitgithub.com/siyuan-note/siyuan/security/advisories/GHSA-43jx-gxq4-jpjc