CVE-2026-47178

{
  "id": "CVE-2026-47178",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-21T22:17:12.503",
  "lastModified": "2026-10-24T19:10:00.127",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.19.0 through 1.21.2, a crafted HEIF file (uncompressed `unci` codec, tiled, component-interleaved, 4:2:0) triggers a heap out-of-bounds write in libheif's uncompressed tile decoder. The write overwrites the C++ vtable pointer of an adjacent `unc_decoder_component_interleave` object; the next virtual call dispatches to an attacker-chosen address. Version 1.22.0 patches the issue."
    },
    {
      "lang": "es",
      "value": "libheif es un decodificador y codificador de formato de archivo HEIF y AVIF. En las versiones 1.19.0 a 1.21.2, un archivo HEIF manipulado (códec ’unci’ sin comprimir, en mosaico, con componentes entrelazados, 4:2:0) desencadena una escritura fuera de límites en el heap en el decodificador de mosaicos sin comprimir de libheif. La escritura sobrescribe el puntero de la vtable de C++ de un objeto ’unc_decoder_component_interleave’ adyacente; la siguiente llamada virtual se despacha a una dirección elegida por el atacante. La versión 1.22.0 corrige el problema."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "strukturag",
          "product": "libheif",
          "versions": [
            {
              "version": ">= 1.19.0, < 1.22.0",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H",
          "baseScore": 6.1,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 4.2
      },
      {
        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-22T15:30:49.683509Z",
          "id": "CVE-2026-47178",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:struktur:libheif:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "1.19.0",
              "versionEndExcluding": "1.22.0",
              "matchCriteriaId": "213101B8-C70F-4134-A6D6-C2E18434237C"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-5x55-x5pf-9c6g",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ]
    }
  ]
}