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openssl_encrypt CVE-2026-74895

| EUVDEUVD-2026-60114 CRITICAL
Protection Mechanism Failure (CWE-693)
2026-08-17 VulnCheck GHSA-562w-22q6-g455
Python Information Disclosure Openssl Encrypt
9.3
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
9.3 CRITICAL
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
vuln.today AI
8.8 HIGH

Exploitation needs a loaded attacker-supplied plugin, so AV:L and PR:L; the missing sandbox breaks the intended confinement boundary (S:C) yielding full C/I/A impact.

3.1 AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
4.0 AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
Analysis Generated
Aug 17, 2026 - 13:03 vuln.today
Patch available
Aug 17, 2026 - 12:01 EUVD
CVE Published
Aug 17, 2026 - 11:04 cve.org
CRITICAL 9.3

DescriptionCVE.org

openssl_encrypt versions before 1.4.0 fail to apply sandbox restrictions in the default process isolation mode for plugin execution. Attackers can execute malicious plugins with unrestricted access to the filesystem, network, subprocess execution, and all Python modules.

Articles & Coverage 2

News 10 New Python Vulnerabilities - 3 Critical, 7 High, 2 With POC Aug 18, 2026 News Critical Sandbox Escape in openssl_encrypt Python Library - CVE-2026-74895 Aug 17, 2026

AnalysisAI

Sandbox escape in the openssl_encrypt Python library (jahlives) before 1.4.0 allows attacker-supplied plugins to run without any isolation because the default process-isolation mode silently fails to enforce its sandbox restrictions. An attacker able to supply or influence a plugin gains unrestricted filesystem, network, subprocess, and full Python-module access equivalent to arbitrary code execution. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Craft malicious plugin
Delivery
Deliver plugin to target loader
Exploit
openssl_encrypt runs it in default isolation mode
Execution
Sandbox restrictions not applied
Persist
Plugin gains full filesystem/network/subprocess access
Impact
Exfiltrate data or execute arbitrary code
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Vulnerability AssessmentAI

Exploitation Exploitation requires openssl_encrypt (before 1.4.0) to execute a plugin under its default process-isolation mode - the specific feature that fails to apply sandbox restrictions - and the attacker must be able to supply, substitute, or influence the plugin that gets loaded. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N, VC:H/VI:H/VA:H) describes a network, low-complexity, no-privileges, no-interaction path to full confidentiality, integrity, and availability loss, driving the 9.3 score. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker crafts a malicious openssl_encrypt plugin and gets a victim to load it (e.g., via a shared plugin, a supply-chain package, or a workflow that processes user-supplied plugins). Because the default process-isolation sandbox is not enforced in versions before 1.4.0, the plugin runs with full host privileges and can read/exfiltrate files, open network connections, and spawn subprocesses. …
Remediation Upgrade openssl_encrypt to version 1.4.0 or later, which is the vendor-released patch that restores sandbox enforcement in process-isolation mode (patch available per the vendor advisory GHSA-623h-chj7-hfx8). … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, inventory all systems and applications using jahlives library and document currently deployed versions across infrastructure. …

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Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-74895 vulnerability details – vuln.today
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