---
id: CVE-2026-113680
title: HarfBuzz 8.0.0 through 14.6.0 WebAssembly Shaper NULL Pointer Dereference DoS
summary: >-
  HarfBuzz from 8.0.0 through 14.6.0 contains a NULL pointer dereference
  vulnerability in the experimental WebAssembly shaper host imports
  buffer_set_contents, face_create, and font_set_coords. Attackers can supply a
  crafted font whose emb…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-476
vendor: harfbuzz
product: harfbuzz
affected:
  - harfbuzz >= 8.0.0 <= 14.6.0
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T15:40:41.101Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-113680'
references:
  - url: 'https://github.com/harfbuzz/harfbuzz/pull/6414'
  - url: >-
      https://github.com/harfbuzz/harfbuzz/commit/a71aa86c2bac114fafb6b47f8da02024ecb44fa6
  - url: >-
      https://github.com/harfbuzz/harfbuzz/blob/14.6.0/src/hb-wasm-api-buffer.hh#L153-L181
  - url: >-
      https://github.com/harfbuzz/harfbuzz/blob/14.6.0/src/hb-wasm-api-face.hh#L34-L49
  - url: >-
      https://github.com/harfbuzz/harfbuzz/blob/14.6.0/src/hb-wasm-api-font.hh#L241-L258
  - url: >-
      https://www.vulncheck.com/advisories/harfbuzz-8.0.0-through-14.6.0-webassembly-shaper-null-pointer-dereference-dos
    label: >-
      VulnCheck Advisory: HarfBuzz 8.0.0 through 14.6.0 WebAssembly Shaper NULL
      Pointer Dereference DoS
tags:
  - cve.org
ingestedAt: '2026-10-20T16:10:53.298Z'
---

## Overview

HarfBuzz from 8.0.0 through 14.6.0 contains a NULL pointer dereference vulnerability in the experimental WebAssembly shaper host imports buffer_set_contents, face_create, and font_set_coords. Attackers can supply a crafted font whose embedded wasm module passes out-of-range addresses with non-zero lengths, crashing any application that shapes text with the font.

## Affected

- `harfbuzz >= 8.0.0 <= 14.6.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.