CVE-2026-95831Hinoki check available

Arbitrary code execution via obfuscated Python dropper

Published Sep 22, 2026 · Updated Sep 22, 2026

Malicious code in Crypt::SelfCertificate 1.01 through 1.05 allows attackers to execute arbitrary code as the invoking user. generate_certificate runs a Python program stored as a certificate sample; the program decodes a hardcoded Base64 HTTP URL, fetches its response, and executes the response body directly. The payload is not triggered by installation hooks or tests; an application must invoke certificate generation, after which the downloaded code inherits that application's privileges without leaving a separate script.

CVSS severityUnavailable
Unscored
EPSS probability0.12%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Malicious code in Crypt::SelfCertificate 1.01 through 1.05 allows attackers to execute arbitrary code as the invoking user. generate_certificate runs a Python program stored as a certificate sample; the program decodes a hardcoded Base64 HTTP URL, fetches its response, and executes the response body directly. The payload is not triggered by installation hooks or tests; an application must invoke certificate generation, after which the downloaded code inherits that application's privileges without leaving a separate script.

The record

CVE
CVE-2026-95831
Published
Sep 22, 2026
Updated
Sep 22, 2026
Vendor
Ryan Scott
Product
Crypt::SelfCertificate
Classifications
T1059.006, T1195.002
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 22, 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?

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  1. Affected versionversion=1.01 <=1.05

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Ryan Scott · Crypt::SelfCertificateversion=1.01 <=1.05

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1059.006Python
T1195.002Compromise Software Supply Chain

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

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