{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.6.4"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2ddfb40794d0b968622c42a82edb94e45b642ea7"
            }
          ],
          "repo": "https://github.com/open-mercato/open-mercato",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "CERT-PL",
    "cwe_ids": [
      "CWE-1333"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/16xxx/CVE-2026-16270.json"
  },
  "details": "Open Mercato does not validate regex rules. An attacker with privileges to create the regex rule can add an unsafe regex to a field. When someone provide the proper string it can result in a DoS attack.\n\n\nThis issue was fixed in version 0.6.4.",
  "id": "CVE-2026-16270",
  "modified": "2026-07-24T03:56:55.853703666Z",
  "published": "2026-07-22T12:37:13.205Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://www.openmercato.com/"
    },
    {
      "type": "ADVISORY",
      "url": "https://cert.pl/posts/2026/07/CVE-2026-16270"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/16xxx/CVE-2026-16270.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-16270"
    },
    {
      "type": "FIX",
      "url": "https://github.com/open-mercato/open-mercato/pull/1996"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/open-mercato/open-mercato"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "ReDoS in Open Mercato"
}