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    PYSEC-2026-3771

    Vulnerability from pysec - Published: 2026-08-17 11:16 - Updated: 2026-09-02 08:34
    VLAI
    Details

    openssl_encrypt versions before 1.4.0 contain a sandbox escape vulnerability in the DangerousPatternVisitor AST analyzer that fails to detect dunder attribute traversal techniques. Attackers can use class, bases, subclasses(), and globals chains to access restricted functions and execute arbitrary system commands from plugin code.

    Impacted products
    Name purl
    openssl-encrypt pkg:pypi/openssl-encrypt

    {
      "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-2026-74896",
        "GHSA-w7gr-9g4g-33mx"
      ],
      "details": "openssl_encrypt versions before 1.4.0 contain a sandbox escape vulnerability in the DangerousPatternVisitor AST analyzer that fails to detect dunder attribute traversal techniques. Attackers can use __class__, __bases__, __subclasses__(), and __globals__ chains to access restricted functions and execute arbitrary system commands from plugin code.",
      "id": "PYSEC-2026-3771",
      "modified": "2026-09-02T08:34:40.447373Z",
      "published": "2026-08-17T11:16:44.787Z",
      "references": [
        {
          "type": "ADVISORY",
          "url": "https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-w7gr-9g4g-33mx"
        },
        {
          "type": "ADVISORY",
          "url": "https://www.vulncheck.com/advisories/openssl-encrypt-before-sandbox-escape-via-dunder-attribute-traversal"
        }
      ],
      "severity": [
        {
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "type": "CVSS_V4"
        }
      ]
    }