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    CVE-2026-113679

    HarfBuzz 8.0.0 through 14.6.0 contains an out-of-bounds write vulnerability in the experimental WebAssembly shaper because the font_glyph_to_string import has a wrong WAMR signature. Attackers can supply a crafted font whose wasm module places the output buffer near linear memory's end, writing glyph-name bytes into host memory to crash or corrupt applications.

    Published:Oct 20, 2026
    Last Modified:Oct 20, 2026
    EPS:Oct 20, 2026
    EPSS Score:
    CVSS Score:7

    Affected Products

    Vendor
    Harfbuzz Project
    Product
    Harfbuzz

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-787 Out-of-bounds Write

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-113680 (CVSS 6.8) — HarfBuzz from 8.0.0 through 14.6.0 contains a NULL pointer dereference vulnerability in the experimental WebAs…
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    CVE-2026-22693 (CVSS 5.3) — HarfBuzz is a text shaping engine. Prior to version 12.3.0, a null pointer dereference vulnerability exists in…
    CVE-2023-25193 (CVSS 7.5) — hb-ot-layout-gsubgpos.hh in HarfBuzz through 6.0.0 allows attackers to trigger O(n^2) growth via consecutive m…
    CVE-2022-33068 (CVSS 5.5) — An integer overflow in the component hb-ot-shape-fallback.cc of Harfbuzz v4.3.0 allows attackers to cause a De…
    CVE-2021-45931 (CVSS 6.5) — HarfBuzz 2.9.0 has an out-of-bounds write in hb_bit_set_invertible_t::set (called from hb_sparseset_t<hb_bit_s…
    CVE-2016-2052 (CVSS 7.6) — Multiple unspecified vulnerabilities in HarfBuzz before 1.0.6, as used in Google Chrome before 48.0.2564.82, a…
    CVE-2015-8947 (CVSS 7.6) — hb-ot-layout-gpos-table.hh in HarfBuzz before 1.0.5 allows remote attackers to cause a denial of service (buff…
    CVE-2015-9274 (CVSS 6.5) — HarfBuzz before 1.0.4 allows remote attackers to cause a denial of service (invalid read of two bytes and appl…

    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