{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "3.2.11"
              },
              {
                "introduced": "3.3.0"
              },
              {
                "fixed": "3.3.13"
              },
              {
                "introduced": "3.4.0"
              },
              {
                "fixed": "3.4.14"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "ba4b1af3a096e8f69e1836b210976585189a5fca"
            },
            {
              "introduced": "c7d3eac70ccde2c4ed484c6638b83ba872f71464"
            },
            {
              "fixed": "ca50a6bb1f64c4d53362e4b67aec33e67cb7d425"
            },
            {
              "introduced": "20a65852895894434bea88613f6d29ac8e88bd6e"
            },
            {
              "fixed": "777d231a179de1711d2a942810d9559216ab3f4c"
            }
          ],
          "repo": "https://github.com/academysoftwarefoundation/openexr",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-f667-c4wm-c8gq"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-122",
      "CWE-190",
      "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59186.json"
  },
  "details": "OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. In versions before 3.2.11, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13, a crafted tiled EXR can trigger a heap out-of-bounds write on 32-bit/ILP32 builds when read through the public TiledRgbaInputFile RGBA API. The file uses a small 40x40 dataWindow but a 65537x65537 tile size. On ILP32, the Array2D\u003cRgba\u003e tile-conversion buffer size calculation overflows, allocates a much smaller heap buffer, and tile decode writes past that allocation. This issue is fixed in versions 3.2.11, 3.3.13, and 3.4.14.",
  "id": "CVE-2026-59186",
  "modified": "2026-08-27T11:30:58.379161518Z",
  "published": "2026-08-25T16:35:58.364Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-f667-c4wm-c8gq"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59186.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59186"
    },
    {
      "type": "FIX",
      "url": "https://github.com/AcademySoftwareFoundation/openexr/commit/71907b44ce9a1b05bf3934b8a7821752750731ab"
    },
    {
      "type": "FIX",
      "url": "https://github.com/AcademySoftwareFoundation/openexr/commit/904141d3a1f86327ad1e2b93fc92ce2dd5881d34"
    },
    {
      "type": "FIX",
      "url": "https://github.com/AcademySoftwareFoundation/openexr/commit/b1a5887372772d79328f4eb42b7f86352a38170b"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "OpenEXR: Heap out-of-bounds write in TiledRgbaInputFile via integer overflow on 32-bit (ILP32) builds"
}