Critical 9.8Published Aug 17, 2026

CVE-2026-74899openssl_encrypt before 1.4.0 Sandbox Escape via Type Hierarchy

Updated under an hour ago (2026-10-19 09:50 UTC)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for jahlives openssl_encrypt

Exploited in the last 30 days

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.

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-95
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Analyzed
Record last updated: Oct 1, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

jahlives openssl_encrypt jahlives:openssl_encrypt (from the name)	before 1.4.0; 1.4.0 not affected	CNA record
jahlives openssl_encrypt jahlives:openssl_encrypt	before 1.4.0	NVD

References

https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-m25m-ggxg-239cvendor-advisory, exploit, mitigation
https://www.vulncheck.com/advisories/openssl-encrypt-before-sandbox-escape-via-type-hierarchythird-party-advisory
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-43jx-gxq4-jpjcnot-applicable

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.