{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:owasp:modsecurity:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "3.0.0"
              },
              {
                "last_affected": "3.0.15"
              }
            ],
            "source": [
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "c1cd668acb820824e791ba802396c60900eae9c1"
            },
            {
              "fixed": "edcd010814e234d46e2ec55a0f1078ff9d3032e4"
            },
            {
              "fixed": "7ea9fefbe0ba409d8733b4d682c8c4c059cd028d"
            }
          ],
          "repo": "https://github.com/owasp-modsecurity/modsecurity",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-qjgm-7gp4-f8qq"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-467"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52761.json"
  },
  "details": "ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. From 3.0.0 through 3.0.15, the t:utf8toUnicode transformation in src/actions/transformations/utf8_to_unicode.cc produces wrong output on i386 architecture because snprintf uses sizeof on a char pointer rather than the length of the unicode buffer, allowing rules that use this transformation to be bypassed on i386 architecture. This issue is fixed in version 3.0.16.",
  "id": "CVE-2026-52761",
  "modified": "2026-08-27T03:30:30.478124904Z",
  "published": "2026-07-10T21:40:23.961Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/owasp-modsecurity/ModSecurity/releases/tag/v3.0.16"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52761.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-qjgm-7gp4-f8qq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52761"
    },
    {
      "type": "FIX",
      "url": "https://github.com/owasp-modsecurity/ModSecurity/commit/edcd010814e234d46e2ec55a0f1078ff9d3032e4"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ModSecurity: Transformation utf8toUnicode produces wrong output on i386 architecture"
}