{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "source": "REFERENCES"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "c3aacf5b96ac1e54b7af1957c6737dbf3949f6d3"
            },
            {
              "fixed": "63ad0902bc0b3b3e82e30d8ac3e5135937bac0c0"
            }
          ],
          "repo": "https://github.com/greyclab/cimg",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-g54r-qmgx-c6fv"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-789"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42146.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "fixed": "c3aacf5b96ac1e54b7af1957c6737dbf3949f6d3"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "CImg Library is a C++ library for image processing. Prior to commit c3aacf5, the nb_colors field read from the BMP file header is used directly to compute an allocation size without validating it against the remaining file size. A crafted BMP file with a large nb_colors value triggers an out-of-memory condition, crashing any application that uses CImg to load untrusted BMP files. This issue has been patched via commit c3aacf5.",
  "id": "CVE-2026-42146",
  "modified": "2026-07-15T01:49:05.476266629Z",
  "published": "2026-05-04T17:53:23.830Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/GreycLab/CImg/releases/tag/v.3.7.5"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42146.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/GreycLab/CImg/security/advisories/GHSA-g54r-qmgx-c6fv"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42146"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/GreycLab/CImg/issues/477"
    },
    {
      "type": "FIX",
      "url": "https://github.com/GreycLab/CImg/commit/c3aacf5b96ac1e54b7af1957c6737dbf3949f6d3"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "CImg Library: Uncontrolled memory allocation via nb_colors field in _load_bmp"
}