Jcharis Machine-Learning-Web-Apps Jinja2 Template app.py render_template cross site scripting

{
  "id": "90ce9dd8513060456ca42e917b2b91753728f9ed24827b4d25ff11ba57a35793",
  "url": "https://osv.dev/vulnerability/CVE-2026-3962",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Jcharis Machine-Learning-Web-Apps Jinja2 Template app.py render_template cross site scripting",
    "summary": "A vulnerability was identified in Jcharis Machine-Learning-Web-Apps up to a6996b634d98ccec4701ac8934016e8175b60eb5. The impacted element is the function render_template of the file Machine-Learning-Web-Apps-master/Build-n-Deploy-Flask-App-with-Waypoint/app/app.py of the component Jinja2 Template Handler. Such manipulation leads to cross site scripting. It is possible to launch the attack remotely. The exploit is publicly available and might be used. This product takes the approach of rolling releases to provide continious delivery. Therefore, version details for affected and updated releases are not available. The project was informed of the problem early through an issue report but has not responded yet.",
    "evidence": "osv:CVE-2026-3962",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2026-3962",
      "aliases": [
        "CVE-2026-3962"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/jcharis/machine-learning-web-apps",
              "type": "GIT",
              "events": [
                {
                  "introduced": "a6996b634d98ccec4701ac8934016e8175b60eb5"
                },
                {
                  "last_affected": "a6996b634d98ccec4701ac8934016e8175b60eb5"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "a6996b634d98ccec4701ac8934016e8175b60eb5"
                      },
                      {
                        "last_affected": "a6996b634d98ccec4701ac8934016e8175b60eb5"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  }
                ]
              }
            }
          ],
          "versions": [
            "a6996b634d98ccec4701ac8934016e8175b60eb5"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-3962.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.052794435Z",
      "provider": "osv",
      "references": [
        "https://github.com/Jcharis/Machine-Learning-Web-Apps/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3962.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-3962",
        "https://vuldb.com/?id.350391",
        "https://vuldb.com/?submit.768226",
        "https://github.com/Jcharis/Machine-Learning-Web-Apps/issues/15",
        "https://github.com/Jcharis/Machine-Learning-Web-Apps/issues/15#issue-3995372171",
        "https://vuldb.com/?ctiid.350391"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79",
          "CWE-94"
        ],
        "cna_assigner": "VulDB",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3962.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-3962",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504273,
  "published_at": "2026-03-11T22:32:08.555+00:00"
}