---
id: "CVE-2026-112018"
kind: "vulnerability"
aliases: ["CVE-2026-112018"]
title: "cgltf: heap out-of-bounds write lets a crafted glTF file corrupt memory"
severity: "high"
cvss: 7.3
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["3d-assets", "c", "cgltf", "gltf", "package"]
not_affected_if: ["trusted-input-only"]
published_at: "2026-10-18T12:17:14+00:00"
first_seen_at: "2026-10-23T21:57:15+00:00"
updated_at: "2026-10-25T03:27:31+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-112018", "first_seen_at": "2026-10-23T21:57:15+00:00"}]
---

# cgltf: heap out-of-bounds write lets a crafted glTF file corrupt memory

cgltf, a C library for loading glTF and GLB 3D model files, has an unchecked sparse accessor index in cgltf_accessor_unpack_floats() that writes past the output buffer. A crafted model file can crash the application or potentially run code when the caller does not call cgltf_validate() first.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- unknown

## Fix

- unknown

## Timeline

- 2026-10-23T21:57:15+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-112018

## From the sources

cgltf through 1.15 contains a heap out-of-bounds write vulnerability in cgltf_accessor_unpack_floats() that allows attackers to write outside the output buffer via unchecked sparse accessor indices. Attackers can supply a crafted glTF or GLB file with large sparse indices to corrupt heap memory, crash applications, and potentially execute code when cgltf_validate() is not called.

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