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    CVE-2026-47178

    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.

    Published:Jul 21, 2026
    Last Modified:Jul 27, 2026
    EPS:Jul 21, 2026
    EPSS Score:0.0015
    CVSS Score:6.1

    Affected Products

    Vendor
    Struktur
    Product
    Libheif

    Exploits

    https://github.com/strukturag/libheif/security/advisories/GHSA-5x55-x5pf-9c6g

    Common Weakness Enumeration

    CWE-787 Out-of-bounds Write

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-62377 (CVSS 4.3) — libheif is a HEIF and AVIF file format decoder and encoder. In 1.23.0 and earlier, a crafted HEIF sequence acc…
    CVE-2026-62291 (CVSS 5.3) — libheif is a HEIF and AVIF file format decoder and encoder. In 1.23.0 and earlier, a crafted image sequence wi…
    CVE-2026-62292 (CVSS 8.7) — libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.1, a crafted uncompressed H…
    CVE-2026-62289 (CVSS 4.3) — libheif is a HEIF and AVIF file format decoder and encoder. In 1.23.0 and earlier, a crafted HEIF or AVIF file…
    CVE-2026-50142 (CVSS 7.5) — libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.0, a crafted HEIF sequence …
    CVE-2026-48029 (CVSS 7.1) — libheif is a HEIF and AVIF file format decoder and encoder. Versions 1.19.0 through 1.21.2 have a heap OOB rea…
    CVE-2026-47709 (CVSS 6.9) — libheif is a HEIF and AVIF file format decoder and encoder. Versions prior to 1.22.0 crashes in the public C A…
    CVE-2026-47254 (CVSS 6.1) — libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.0, `Track::init_sample_timin…
    CVE-2026-47251 (CVSS 6.8) — libheif is a HEIF and AVIF file format decoder and encoder. The fix for CVE-2026-3949 (commit `b97c8b5`, PR #1…
    CVE-2026-47247 (CVSS 7.5) — libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.0, two bugs in libheif chain…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High