{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "3.4.0"
              },
              {
                "fixed": "3.4.9"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "20a65852895894434bea88613f6d29ac8e88bd6e"
            },
            {
              "fixed": "b5fa98ac6b5fc660c0295123c1d02bbf687dbec3"
            }
          ],
          "repo": "https://github.com/academysoftwarefoundation/openexr",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-v76p-4qvv-vh4g"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-190"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34378.json"
  },
  "details": "OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.4.0 to before 3.4.9, a missing bounds check on the dataWindow attribute in EXR file headers allows an attacker to trigger a signed integer overflow in generic_unpack(). By setting dataWindow.min.x to a large negative value, OpenEXRCore computes an enormous image width, which is later used in a signed integer multiplication that overflows, causing the process to terminate with SIGILL via UBSan. This vulnerability is fixed in 3.4.9.",
  "id": "CVE-2026-34378",
  "modified": "2026-07-15T01:49:15.843720715Z",
  "published": "2026-04-06T15:19:34.871Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.9"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-v76p-4qvv-vh4g"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34378.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34378"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "OpenEXR has a signed integer overflow in generic_unpack() when parsing EXR files with crafted negative dataWindow.min.x"
}