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CVE-2026-112018— cgltf through 1.15 Heap Out-of-Bounds Write via cgltf_accessor_unpack_floats()

Quick assessment

Affected
jkuhlmann cgltf
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

cgltf 1.15 及更早版本在 函数中存在堆越界写入漏洞。该漏洞允许攻击者通过未检查的稀疏访问器（sparse accessor）索引，向输出缓冲区之外写入数据。攻击者可构造包含大型稀疏索引的 glTF 或 GLB 文件，从而破坏堆内存、导致应用程序崩溃，并在未调用 函数进行验证时，可能实现代码执行。

CVSS 7.0 · High

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 1

VendorProduct Version RangeStatus
jkuhlmann cgltf ≤ 1.15 affected
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I. Basic Information for CVE-2026-112018

Vulnerability Information
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Vulnerability Title
cgltf through 1.15 Heap Out-of-Bounds Write via cgltf_accessor_unpack_floats()
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
jkuhlmann cgltf 0 ~ 1.15 -

II. Public POCs for CVE-2026-112018

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III. Intelligence Information for CVE-2026-112018

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Vendor Pages for CVE-2026-112018 (1)

Other References for CVE-2026-112018 (1)

IV. Related Vulnerabilities

Same product: cgltf
Same vendor: jkuhlmann
Same weakness: CWE-787

V. Comments for CVE-2026-112018

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