CVE-2026-49271

{
  "id": "CVE-2026-49271",
  "sourceIdentifier": "[email protected]",
  "published": "2026-06-19T18:16:19.353",
  "lastModified": "2026-10-25T23:10:00.167",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.1, the uncompressed HEIF decoder validates explicit icef compressed-unit offsets using unit_offset + unit_size. Because the addition can wrap, a crafted HEIF file can pass the range check and then construct a vector from iterators outside the compressed item buffer, producing an out-of-bounds heap read and crash. Version 1.22.1 patches the issue."
    },
    {
      "lang": "es",
      "value": "libheif es un decodificador y codificador de formato de archivo HEIF y AVIF. Antes de la versión 1.22.1, el decodificador HEIF sin comprimir valida los desplazamientos explícitos de unidades comprimidas icef utilizando unit_offset + unit_size. Debido a que la adición puede desbordarse, un archivo HEIF manipulado puede pasar la verificación de rango y luego construir un vector a partir de iteradores fuera del búfer de elementos comprimidos, produciendo una lectura fuera de límites en el heap y un fallo. La versión 1.22.1 corrige el problema."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "strukturag",
          "product": "libheif",
          "versions": [
            {
              "version": "< 1.22.1",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-06-22T17:01:07.409364Z",
          "id": "CVE-2026-49271",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:struktur:libheif:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "1.22.1",
              "matchCriteriaId": "9F3B7B77-FD41-45AE-BC05-FF850198DAC1"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-r7qj-cg5r-r6vf",
      "source": "[email protected]",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-r7qj-cg5r-r6vf",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ]
    }
  ]
}