---
id: "CVE-2026-129478"
page: "https://infrastack.ai/live/CVE-2026-129478"
kind: "vulnerability"
aliases: ["CVE-2026-129478"]
title: "Assimp: crafted glTF file reads heap memory out of bounds"
severity: "medium"
cvss: 6.9
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["3d-models", "assimp", "gltf", "package"]
not_affected_if: ["trusted-input-only"]
published_at: "2026-11-15T14:17:26+00:00"
first_seen_at: "2026-11-15T14:36:15+00:00"
updated_at: "2026-11-15T14:37:36+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-129478", "first_seen_at": "2026-11-15T14:36:15+00:00"}]
exploit_sources: []
---

# Assimp: crafted glTF file reads heap memory out of bounds

Link for people: https://infrastack.ai/live/CVE-2026-129478 (this .md is for agents)

Assimp, a 3D model import library, mishandles a data offset in its glTF URI parser because it is stored in a signed char. A crafted glTF file can crash an application or leak adjacent heap memory.

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

## How to check

- Check whether your project depends on Assimp (look for `assimp` in build files or package manifests)
- Check the Assimp version in use against the fixed version, if the sources give one: unknown

## Timeline

- 2026-11-15T14:36:15+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-129478

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/assimp-through-6.0.6-heap-out-of-bounds-read-via-gltf-parsedatauri

## From the sources

Assimp through 6.0.6 contains a heap out-of-bounds read vulnerability in glTFCommon::Util::ParseDataURI caused by storing the data offset in a signed char. Attackers can supply a crafted glTF file with a raw data URI whose segment starts beyond byte 127 to crash applications or leak adjacent heap memory.

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_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_