{
  "affected": [
    {
      "affectedData": [
        {
          "product": "openexr",
          "vendor": "AcademySoftwareFoundation",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.2.10"
            },
            {
              "status": "affected",
              "version": "\u003e= 3.3.0, \u003c= 3.3.12"
            },
            {
              "status": "affected",
              "version": "\u003e= 3.4.0, \u003c= 3.4.13"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. In versions 3.4.0 through 3.4.12, a reachable assertion failure in the HTJ2K decode path allows a crafted HTJ2K-compressed EXR file to cause an unconditional process abort in any application that calls exr_start_read() on untrusted input, resulting in denial of service. The crash is triggered by a QCD marker whose lower five bits are zero, which OpenEXR passes into the vendored OpenJPH library while constructing the codestream and evaluating its quantization delta parameters. OpenJPH uses an assertion rather than a recoverable error to validate those bits, so any invalid value calls abort() directly and cannot be intercepted by surrounding error handling, a problem compounded by OpenEXR wrapping only its internal HT header parser in error handling while leaving the later codestream read and construction calls unprotected. This issue has been resolved in version 3.4.13."
    },
    {
      "lang": "es",
      "value": "OpenEXR es la implementaci\u00f3n de referencia y especificaci\u00f3n para el formato de imagen EXR, ampliamente utilizado en la industria cinematogr\u00e1fica. En las versiones 3.4.0 a 3.4.12, un fallo de aserci\u00f3n alcanzable en la ruta de decodificaci\u00f3n HTJ2K permite que un archivo EXR comprimido con HTJ2K manipulado cause una interrupci\u00f3n incondicional del proceso en cualquier aplicaci\u00f3n que llame a exr_start_read() con entrada no confiable, lo que resulta en denegaci\u00f3n de servicio. El fallo es provocado por un marcador QCD cuyos cinco bits inferiores son cero, que OpenEXR pasa a la biblioteca OpenJPH de terceros mientras construye el flujo de c\u00f3digo y eval\u00faa sus par\u00e1metros delta de cuantificaci\u00f3n. OpenJPH utiliza una aserci\u00f3n en lugar de un error recuperable para validar esos bits, por lo que cualquier valor no v\u00e1lido llama directamente a abort() y no puede ser interceptado por el manejo de errores circundante, un problema agravado por el hecho de que OpenEXR envuelve solo su analizador interno de encabezados HT en el manejo de errores, dejando desprotegidas las llamadas posteriores de lectura y construcci\u00f3n del flujo de c\u00f3digo. Este problema ha sido resuelto en la versi\u00f3n 3.4.13."
    }
  ],
  "id": "CVE-2026-54920",
  "lastModified": "2026-10-12T15:10:00.207",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 0.0,
          "baseSeverity": "NONE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 0.0,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-54920",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-25T15:16:54.226826Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-25T01:16:36.290",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-fp75-87pr-8329"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-fp75-87pr-8329"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-190"
        },
        {
          "lang": "en",
          "value": "CWE-824"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}