Security advisory

{
  "id": "b097cdac1b98618e1dda70b0e3735f6c8c3b34a9fbe357162ff2327e78b51768",
  "url": "https://osv.dev/vulnerability/CVE-2021-32091",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-32091",
    "summary": "A Cross-site scripting (XSS) vulnerability exists in StackLift LocalStack 0.12.6.",
    "evidence": "osv:CVE-2021-32091",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-32091",
      "aliases": [
        "CVE-2021-32091",
        "GHSA-37m5-42qp-4qpr",
        "PYSEC-2021-102"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/localstack/localstack",
              "type": "GIT",
              "events": [
                {
                  "introduced": "776465ce56d8e6cb2c2464c316f82733890007ba"
                },
                {
                  "last_affected": "776465ce56d8e6cb2c2464c316f82733890007ba"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:localstack:localstack:0.12.6:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.12.6"
                      },
                      {
                        "last_affected": "0.12.6"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.12.6",
            "v0.12.6"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-32091.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:25.838717888Z",
      "provider": "osv",
      "references": [
        "https://blog.sonarsource.com/hack-the-stack-with-localstack",
        "https://portswigger.net/daily-swig/localstack-zero-day-vulnerabilities-chained-to-achieve-remote-takeover-of-local-instances"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-32091",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 431457,
  "published_at": "2021-05-07T05:15:08.247+00:00"
}