Application crash via sparse accessor integer overflow
Published Mar 23, 2026 · Updated Mar 23, 2026
Integer overflow in cgltf 1.15 and earlier allows attackers to crash applications via crafted glTF or GLB files. The cgltf_validate() sparse-accessor size check multiplies attacker-controlled counts without detecting size_t wraparound, then cgltf_calc_index_bound() reads beyond the loaded index buffer. Reachability requires an application to load buffer data before validation; the demonstrated consequence is a process crash, while memory disclosure remains unproven.
Summary
What happened
Integer overflow in cgltf 1.15 and earlier allows attackers to crash applications via crafted glTF or GLB files. The cgltf_validate() sparse-accessor size check multiplies attacker-controlled counts without detecting size_t wraparound, then cgltf_calc_index_bound() reads beyond the loaded index buffer. Reachability requires an application to load buffer data before validation; the demonstrated consequence is a process crash, while memory disclosure remains unproven.
The record
- CVE
- CVE-2026-32845
- Published
- Mar 23, 2026
- Updated
- Mar 23, 2026
- Vendor
- Johannes Kuhlmann
- Product
- cgltf
- Classifications
- CWE-190
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 23, 2026CVE publishedPublication date reported by the CVE source.
- Mar 23, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=1.15.0
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- cgltf sparse-accessor crash reproducerproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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