Security advisory

{
  "id": "c284310504297e4a53e5e77efbe9befc3c5e6b2918ceb0de32d64e6a65e26a0b",
  "url": "https://osv.dev/vulnerability/CVE-2021-28667",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-28667",
    "summary": "StackStorm before 3.4.1, in some situations, has an infinite loop that consumes all available memory and disk space. This can occur if Python 3.x is used, the locale is not utf-8, and there is an attempt to log Unicode data (from an action or rule name).",
    "evidence": "osv:CVE-2021-28667",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-28667",
      "aliases": [
        "CVE-2021-28667"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/stackstorm/st2",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "7a8b13f58b88dba95b1e9bb21432af22b1b6f48a"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:stackstorm:stackstorm:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "3.4.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v3.4.0",
            "v2.9.3"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-28667.json"
          }
        }
      ],
      "modified": "2026-10-24T10:31:01.178980682Z",
      "provider": "osv",
      "references": [
        "https://stackstorm.com/2021/03/10/stackstorm-v3-4-1-security-fix/"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-28667",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 439734,
  "published_at": "2021-03-18T03:15:12.047+00:00"
}