---
id: CVE-2026-74887
aliases:
  - PYSEC-2026-3745
  - GHSA-cx72-m6xj-3vf6
title: >-
  openssl_encrypt before 1.4.0 imports Python's non-cryptographic 'random'
  module (Mersenne Twister PRNG) at line 15 of openssl_encrypt/mod…
summary: >-
  openssl_encrypt before 1.4.0 imports Python's non-cryptographic 'random'
  module (Mersenne Twister PRNG) at line 15 of openssl_encrypt/modules/pqc.py.
  No direct calls to random.* were present in the code, so no cryptographic
  operation is …
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N'
vendor: openssl-encrypt
product: openssl-encrypt
ecosystem: pip
affected:
  - openssl-encrypt < 1.4.0
patched:
  - openssl-encrypt 1.4.0
published: '2026-08-17'
updated: '2026-09-01'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/PYSEC-2026-3745'
references:
  - url: >-
      https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-cx72-m6xj-3vf6
  - url: >-
      https://www.vulncheck.com/advisories/openssl-encrypt-before-insecure-random-import-in-pqc-module
tags:
  - osv
  - pip
epss: 0.00299
epssPercentile: 0.20026
ingestedAt: '2026-09-02T19:31:24.754Z'
---

## Overview

openssl_encrypt before 1.4.0 imports Python's non-cryptographic 'random' module (Mersenne Twister PRNG) at line 15 of openssl_encrypt/modules/pqc.py. No direct calls to random.* were present in the code, so no cryptographic operation is currently affected; however, the import creates a hazard that future code could inadvertently use random.randint() instead of a cryptographically secure alternative (secrets/os.urandom), producing predictable values since the Mersenne Twister state can be recovered from approximately 624 outputs. Fixed by removing the import in 1.4.0.

## Affected packages

- `openssl-encrypt < 1.4.0`

## Remediation

Upgrade to a patched release:

- `openssl-encrypt 1.4.0`