Ghost: Regular Expression Denial of Service in Content Import

{
  "id": "019534c818c302635bda2987a57685403ff7bfe29e27311ccd419951a3ac2e9b",
  "url": "https://osv.dev/vulnerability/GHSA-fwh9-qg68-vxp4",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Ghost: Regular Expression Denial of Service in Content Import",
    "summary": "### Impact A crafted content import file could cause excessive CPU usage, making the Ghost server unresponsive. Exploiting this requires Administrator access. ### Vulnerable versions This vulnerability is present in Ghost from v4.0.0 up to v6.65.0. ### Patches v6.67.0 contains a fix for this issue. ### How to update For self-hosters using Docker, find [Docker's official Ghost image here](https://hub.docker.com/_/ghost). Updating a Docker-based Ghost instance [is documented here](https://docs.ghost.org/install/docker#updating-ghost). If your Ghost is a Ghost-CLI install see our documentation on [updating it to the latest version here](https://docs.ghost.org/update). ### References Ghost thanks [ka3n1x](https://github.com/ka3n1x) for disclosing this vulnerability responsibly. ### For more information If you have any questions or comments about this advisory, email us at [security@ghost.org](mailto:security@ghost.org).",
    "evidence": "osv:GHSA-fwh9-qg68-vxp4",
    "products": [
      {
        "name": {
          "value": "ghost",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.67.0",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "GHSA-fwh9-qg68-vxp4",
      "aliases": [
        "BIT-ghost-2026-105646",
        "CVE-2026-105646",
        "GHSA-fwh9-qg68-vxp4"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "4.0.0"
                },
                {
                  "fixed": "6.67.0"
                }
              ]
            }
          ],
          "package": {
            "name": "ghost",
            "purl": "pkg:npm/ghost",
            "ecosystem": "npm"
          },
          "database_specific": {
            "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-fwh9-qg68-vxp4/GHSA-fwh9-qg68-vxp4.json"
          }
        }
      ],
      "modified": "2026-10-13T08:25:52.318807316Z",
      "provider": "osv",
      "references": [
        "https://github.com/TryGhost/Ghost/security/advisories/GHSA-fwh9-qg68-vxp4",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-105646",
        "https://github.com/TryGhost/Ghost/pull/31058",
        "https://github.com/TryGhost/Ghost/commit/88ae6d6d56f8a239cb38a8c89de02f034f50e2ce",
        "https://github.com/TryGhost/Ghost",
        "https://github.com/TryGhost/Ghost/releases/tag/v6.66.0"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-1333"
        ],
        "severity": "MODERATE",
        "github_reviewed": true,
        "nvd_published_at": "2026-10-05T19:17:19Z",
        "github_reviewed_at": "2026-10-07T20:42:53Z"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-105646",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 307496,
  "published_at": "2026-10-07T20:42:53+00:00"
}