PYSEC-2026-3745

Vulnerability from pysec - Published: 2026-08-17 11:16 - Updated: 2026-09-01 08:54
VLAI
Details

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.

Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Impacted products
Name purl
openssl-encrypt pkg:pypi/openssl-encrypt
Aliases
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "PyPI",
        "name": "openssl-encrypt",
        "purl": "pkg:pypi/openssl-encrypt"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.4.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.2.2",
        "0.2.3",
        "0.2.4",
        "0.2.5",
        "0.2.6",
        "0.3.0",
        "0.3.1",
        "0.3.2",
        "0.3.3",
        "0.4.0",
        "0.4.1",
        "0.4.2",
        "0.4.3",
        "0.4.4",
        "0.5.0",
        "0.5.1",
        "0.5.3",
        "0.6.0rc1",
        "0.7.0rc2",
        "0.7.1",
        "0.7.2",
        "0.8.0",
        "0.8.1",
        "0.8.2",
        "0.9.2",
        "1.0.0",
        "1.0.1",
        "1.0.2",
        "1.0.3",
        "1.1.0",
        "1.2.0",
        "1.2.1",
        "1.3.0",
        "1.3.1",
        "1.3.2",
        "1.3.3",
        "1.3.4",
        "1.3.5",
        "1.4.0b3",
        "1.4.0b4",
        "1.4.0b5",
        "1.4.0b6",
        "1.4.0b7",
        "1.4.0b8"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-74887",
    "GHSA-cx72-m6xj-3vf6"
  ],
  "details": "openssl_encrypt before 1.4.0 imports Python\u0027s non-cryptographic \u0027random\u0027 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.",
  "id": "PYSEC-2026-3745",
  "modified": "2026-09-01T08:54:57.296518Z",
  "published": "2026-08-17T11:16:43.523Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-cx72-m6xj-3vf6"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/openssl-encrypt-before-insecure-random-import-in-pqc-module"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}



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