Security advisory

{
  "id": "0c36320c2abcbfba496669cb2a8b2ebaef6c8122814b55ea120390855939ca07",
  "url": "https://osv.dev/vulnerability/CVE-2026-3449",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-3449",
    "summary": "Versions of the package @tootallnate/once before 3.0.1 are vulnerable to Incorrect Control Flow Scoping in promise resolving when AbortSignal option is used. The Promise remains in a permanently pending state after the signal is aborted, causing any await or .then() usage to hang indefinitely. This can cause a control-flow leak that can lead to stalled requests, blocked workers, or degraded application availability.",
    "evidence": "osv:CVE-2026-3449",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2026-3449",
      "aliases": [
        "CVE-2026-3449",
        "GHSA-vpq2-c234-7xj6"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/tootallnate/once",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "b31c7623e18b128325a05da02aa0832ee289b893"
                },
                {
                  "fixed": "b9f43cc5259bee2952d91ad3cdbd201a82df448a"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "3.0.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "b9f43cc5259bee2952d91ad3cdbd201a82df448a"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.0.0",
            "3.0.0",
            "1.1.2",
            "1.1.1",
            "1.1.0",
            "1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-3449.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.949697455Z",
      "provider": "osv",
      "references": [
        "https://security.snyk.io/vuln/SNYK-JS-TOOTALLNATEONCE-15250612",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3449.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-3449",
        "https://github.com/TooTallNate/once/issues/8",
        "https://github.com/TooTallNate/once/commit/b9f43cc5259bee2952d91ad3cdbd201a82df448a"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-705"
        ],
        "cna_assigner": "snyk",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3449.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-3449",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 505234,
  "published_at": "2026-03-03T05:00:01.085+00:00"
}