CVE-2026-74899Public exploitNetwork attack vector

Code execution via type hierarchy traversal

Published Aug 17, 2026 · Updated Aug 18, 2026

Sandbox escape in IsolatedPluginExecutor in jahlives openssl_encrypt before 1.4.0 allows attackers to execute OS commands via crafted plugin code. The sandbox builds a restricted exec() builtins dictionary but leaves Python type objects such as str, int, and list reachable, letting untrusted plugin code walk class.mro.subclasses() into globals that expose system functions. Exposure depends on any deployment that runs attacker-supplied plugins through this executor; once reached, the escape gives the plugin host arbitrary command execution rather than only bypassing logical sandbox restrictions.

CVSS severity9.8
Critical
EPSS probability0.49%
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 IsolatedPluginExecutor in jahlives openssl_encrypt before 1.4.0 allows attackers to execute OS commands via crafted plugin code. The sandbox builds a restricted exec() builtins dictionary but leaves Python type objects such as str, int, and list reachable, letting untrusted plugin code walk class.mro.subclasses() into globals that expose system functions. Exposure depends on any deployment that runs attacker-supplied plugins through this executor; once reached, the escape gives the plugin host arbitrary command execution rather than only bypassing logical sandbox restrictions.

The record

CVE
CVE-2026-74899
Published
Aug 17, 2026
Updated
Aug 18, 2026
Vendor
jahlives
Product
OpenSSL Encrypt
Classifications
CWE-95, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 18, 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

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

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-95Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
T1059Command and Scripting Interpreter

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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