jkuhlmann cgltf up to 1.15 Accessor cgltf_accessor_unpack_floats out-of-bounds write

Summaryinfo

A vulnerability labeled as critical has been found in jkuhlmann cgltf up to 1.15. This vulnerability affects the function cgltf_accessor_unpack_floats of the component Accessor. Executing a manipulation can lead to out-of-bounds write. This vulnerability is tracked as CVE-2026-112018. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as critical was found in jkuhlmann cgltf up to 1.15. This vulnerability affects the function cgltf_accessor_unpack_floats of the component Accessor. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at hackmd.io. This vulnerability was named CVE-2026-112018 since 10/18/2026. The exploitation appears to be easy. The attack can be initiated remotely. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/18/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• jkuhlmann

Name

• cgltf

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Once again VulDB remains the best source for vulnerability data.

Discussion