RCE in Jahlives OpenSSL Encrypt
CVE-2026-74899
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (53.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.007 · change: +0.003
Affected products
- Jahlives OpenSSL Encrypt — versions 0, 1.4.0
Weakness classification (CWE)
References
- GitHub Security Advisory (GHSA-m25m-ggxg-239c) (vendor-advisory, Exploit, Mitigation, Vendor Advisory)
- VulnCheck Advisory: openssl_encrypt before 1.4.0 Sandbox Escape via Type Hierarchy (Third Party Advisory, third-party-advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Not Applicable)
Frequently asked questions
- What is CVE-2026-74899?
- CVE-2026-74899 is a critical-severity vulnerability in Jahlives OpenSSL Encrypt, classified under Eval Injection. CVSS score: 9.8/10. Published 2026-08-17.
- How severe is CVE-2026-74899?
- Critical severity. CVSS v3 base score is 9.8 out of 10.