Vulnerability · Published Mar 23, 2026 · Assigned by VulnCheck

CVE-2026-32845jkuhlmann / cgltf <= 1.15 Sparse Accessor Validation Integer Overflow

High 8.4

In plain English

A high-severity integer overflow in cgltf from jkuhlmann. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).

Severity (CVSS 3.1)8.4High

Exploit odds (30 days)0.1%top 96.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

cgltf version 1.15 and prior contain an integer overflow vulnerability in the cgltf_validate() function when validating sparse accessors that allows attackers to trigger out-of-bounds reads by supplying crafted glTF/GLB input files with attacker-controlled size values. Attackers can exploit unchecked arithmetic operations in sparse accessor validation to cause heap buffer over-reads in cgltf_calc_index_bound(), resulting in denial of service crashes and potential memory disclosure.

Affected products (as reported)

Vendor	Product	Versions
jkuhlmann	cgltf	0 – through 1.15.0

Weakness: CWE-190 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

https://github.com/jkuhlmann/cgltf/issues/287 technical-description, exploit
https://github.com/jkuhlmann/cgltf/pull/293 issue-tracking
https://www.vulncheck.com/advisories/jkuhlmann-cgltf-sparse-accessor-validation-integer-overflow third-party-advisory