CVE-2026-74896Public exploitNetwork attack vector

Command execution via dunder attribute traversal

Published Aug 17, 2026 · Updated Aug 17, 2026

Sandbox escape in OpenSSL Encrypt before 1.4.0 allows attackers to execute arbitrary system commands via crafted plugin code. DangerousPatternVisitor in openssl_encrypt/modules/plugin_system/plugin_ast_analyzer.py fails to flag dunder attribute chains such as class.bases[0].subclasses() and globals access, so malicious code passes AST validation and reaches restricted functions at runtime. Exposure depends on whether attackers can feed plugin code into the vulnerable path; when reachable, the sandbox boundary no longer limits command execution.

CVSS severity9.8
Critical
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sandbox escape in OpenSSL Encrypt before 1.4.0 allows attackers to execute arbitrary system commands via crafted plugin code. DangerousPatternVisitor in openssl_encrypt/modules/plugin_system/plugin_ast_analyzer.py fails to flag dunder attribute chains such as class.bases[0].subclasses() and globals access, so malicious code passes AST validation and reaches restricted functions at runtime. Exposure depends on whether attackers can feed plugin code into the vulnerable path; when reachable, the sandbox boundary no longer limits command execution.

The record

CVE
CVE-2026-74896
Published
Aug 17, 2026
Updated
Aug 17, 2026
Vendor
jahlives
Product
OpenSSL Encrypt
Classifications
CWE-693, T1059.006
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

jahlives · OpenSSL Encryptversion=0 <1.4.0

Published CVSS scores

9.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-693Protection Mechanism Failure
T1059.006Command and Scripting Interpreter: Python

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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