{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.23.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "e1a0bc1c1ae74f8075eaca30a1cdb2b9bee698d3"
            },
            {
              "fixed": "2c4bbb54c2738d4a5efbbe3e5fa1d5d76bb88eb0"
            }
          ],
          "repo": "https://github.com/strukturag/libheif",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-9ww4-9v47-m7pj"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-617",
      "CWE-908"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/62xxx/CVE-2026-62377.json"
  },
  "details": "libheif is a HEIF and AVIF file format decoder and encoder. In 1.23.0 and earlier, a crafted HEIF sequence accepted by heif_context_read_from_memory() can leave the context with no registered sequence tracks and crash when heif_context_get_track(ctx, 0) is called. HeifContext::get_track() in libheif/context.cc executes assert(has_sequence()) before its normal error handling, so assert-enabled builds abort instead of allowing the public wrapper in libheif/api/libheif/heif_sequences.cc to return null. In release builds, removing the assertion lets the track_id zero path dereference m_tracks.begin()-\u003esecond on an empty map, which is undefined behavior and typically crashes. The issue is reachable through documented public APIs after parsing attacker-controlled bytes. This issue is fixed in version 1.23.1.",
  "id": "CVE-2026-62377",
  "modified": "2026-09-11T03:30:40.397253163Z",
  "published": "2026-08-18T21:22:29.899Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/strukturag/libheif/releases/tag/v1.23.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/62xxx/CVE-2026-62377.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-9ww4-9v47-m7pj"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-62377"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/strukturag/libheif/issues/1844"
    },
    {
      "type": "FIX",
      "url": "https://github.com/strukturag/libheif/commit/e1a0bc1c1ae74f8075eaca30a1cdb2b9bee698d3"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "libheif: Reachable assertion in HeifContext::get_track() aborts on a valid-but-empty HEIF sequence file (context.cc:2110)"
}