{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "simple-markdown"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.5.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2020-08-31T18:49:00Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "## Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-gpvj-gp8c-c7p2. This link is maintained to preserve external references.\n\n## Original Description\n\nVersions of `simple-markdown` prior to 0.5.2 are vulnerable to Regular Expression Denial of Service (ReDoS). The `SimpleMarkdown.defaultInlineParse()` function has significantly degraded performance when parsing inline code blocks.\n\n\n## Recommendation\n\nUpgrade to version 0.5.2 or later.",
  "id": "GHSA-4xf9-pgvv-xx67",
  "modified": "2026-02-03T17:52:55Z",
  "published": "2020-09-03T20:27:46Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/Khan/simple-markdown/issues/71"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ariabuckles/simple-markdown/commit/89797fef9abb4cab2fb76a335968266a92588816"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/Khan/simple-markdown"
    },
    {
      "type": "WEB",
      "url": "https://snyk.io/vuln/SNYK-JS-SIMPLEMARKDOWN-460540"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Duplicate Advisory: Regular Expression Denial of Service in simple-markdown",
  "withdrawn": "2026-02-03T17:52:55Z"
}