{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "1.19.0"
              },
              {
                "fixed": "1.23.2"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "c4e4657dcf6bcc06e934632f97736f7c78dbff9e"
            },
            {
              "fixed": "21893e8f66c8b79363ca2809391b07d35e1a95ec"
            },
            {
              "fixed": "ac1cb05c39008f01525c991ff8b88f84ddf70fd2"
            }
          ],
          "repo": "https://github.com/strukturag/libheif",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-24wx-9w62-c96w"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-409"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84384.json"
  },
  "details": "libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.2, crafted HEIF or AVIF mime metadata and unci image data can cause decompress_brotli() and do_inflate() to grow accumulated output without an effective size limit or MemoryHandle accounting. The brotli path has no output bound, while the zlib path checks only a small temporary buffer in a branch that valid streams do not reach, and overlapping icef units can decompress the same payload repeatedly. HeifContext::interpret_heif_file_images() processes multiple compressed metadata items during file opening, allowing a small file to consume unbounded memory and terminate the process. This issue is fixed in version 1.23.2.",
  "id": "CVE-2026-84384",
  "modified": "2026-09-20T11:30:55.621980194Z",
  "published": "2026-09-18T15:58:21.860Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/strukturag/libheif/releases/tag/v1.23.2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84384.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-24wx-9w62-c96w"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-84384"
    },
    {
      "type": "FIX",
      "url": "https://github.com/strukturag/libheif/commit/21893e8f66c8b79363ca2809391b07d35e1a95ec"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "libheif: brotli/zlib decompression paths lack output-size limits, allowing decompression-bomb OOM/DoS"
}