Security advisory

{
  "id": "6a477da0e5e640866c7b7f83850db844dcf6b10dc55d9b3a12ce978b970feaba",
  "url": "https://osv.dev/vulnerability/CVE-2016-3957",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2016-3957",
    "summary": "The secure_load function in gluon/utils.py in web2py before 2.14.2 uses pickle.loads to deserialize session information stored in cookies, which might allow remote attackers to execute arbitrary code by leveraging knowledge of encryption_key.",
    "evidence": "osv:CVE-2016-3957",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2016-3957",
      "aliases": [
        "CVE-2016-3957"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/web2py/web2py",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "32650f0cbf2c0211195e792a219899f74856b73e"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:web2py:web2py:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.14.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "R-2.14.1",
            "R-2.13.4",
            "R-2.13.3",
            "R-2.13.2",
            "R-2.13.1",
            "R-2.12.3",
            "R-2.12.2",
            "R-2.12.1",
            "R-2.11.2",
            "R-2.11.1",
            "R-2.10.4",
            "R-2.10.4.beta",
            "R-2.10.3",
            "R-2.10.2",
            "R-2.10.1",
            "R-2.9.12",
            "R-2.9.11",
            "R-2.9.10",
            "R-2.9.9",
            "R-2.9.8",
            "R-2.9.7",
            "R-2.9.6",
            "R-2.9.5",
            "R-2.9.4",
            "R-2.9.3",
            "R-2.9.2",
            "R-2.8.2",
            "R-2.8.1",
            "R-2.7.4",
            "R-2.7.3",
            "R-2.7.2",
            "R-2.7.1",
            "R-2.6.4",
            "R-2.6.3",
            "R-2.6.2",
            "R-2.6.1",
            "R-2.5.1",
            "R-2.4.7",
            "R-2.4.6",
            "R-2.4.5",
            "R-2.4.4",
            "R-2.4.3",
            "R-2.4.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-3957.json"
          }
        }
      ],
      "modified": "2026-10-20T10:47:36.662479451Z",
      "provider": "osv",
      "references": [
        "https://usn.ubuntu.com/4030-1/",
        "https://github.com/web2py/web2py/blob/R-2.14.1/gluon/utils.py#L200",
        "https://devco.re/blog/2017/01/03/web2py-unserialize-code-execution-CVE-2016-3957/"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2016-3957",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 379577,
  "published_at": "2018-02-06T18:29:00.4+00:00"
}