CVE-2026-32845: Integer Overflow or Wraparound in jkuhlmann cgltf
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.
AI Analysis
Technical Summary
The vulnerability in cgltf (versions 0 through 1.15) arises from unchecked arithmetic operations in the cgltf_validate() function when processing sparse accessors. Specifically, an integer overflow or wraparound can occur during validation of attacker-supplied size values in glTF/GLB input files. This results in heap buffer over-reads in the cgltf_calc_index_bound() function, which can cause application crashes (denial of service) and may expose memory contents, posing a risk of information disclosure.
Potential Impact
Exploitation of this vulnerability can cause denial of service through application crashes due to heap buffer over-reads. Additionally, there is a potential for memory disclosure, which could leak sensitive information from the affected process's memory space. The CVSS 4.0 base score is 6.9 (medium severity), reflecting local attack vector with no privileges or user interaction required, but high impact on availability and potential impact on confidentiality.
Mitigation Recommendations
No official patch or fix is currently documented for this vulnerability. Users should monitor the vendor's advisory channels for updates. Until a fix is available, avoid processing untrusted or malformed glTF/GLB files with cgltf versions 0 through 1.15 to mitigate risk. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
CVE-2026-32845: Integer Overflow or Wraparound in jkuhlmann cgltf
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.
CVSS v4.0
Score 6.9medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in cgltf (versions 0 through 1.15) arises from unchecked arithmetic operations in the cgltf_validate() function when processing sparse accessors. Specifically, an integer overflow or wraparound can occur during validation of attacker-supplied size values in glTF/GLB input files. This results in heap buffer over-reads in the cgltf_calc_index_bound() function, which can cause application crashes (denial of service) and may expose memory contents, posing a risk of information disclosure.
Potential Impact
Exploitation of this vulnerability can cause denial of service through application crashes due to heap buffer over-reads. Additionally, there is a potential for memory disclosure, which could leak sensitive information from the affected process's memory space. The CVSS 4.0 base score is 6.9 (medium severity), reflecting local attack vector with no privileges or user interaction required, but high impact on availability and potential impact on confidentiality.
Mitigation Recommendations
No official patch or fix is currently documented for this vulnerability. Users should monitor the vendor's advisory channels for updates. Until a fix is available, avoid processing untrusted or malformed glTF/GLB files with cgltf versions 0 through 1.15 to mitigate risk. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-03-16T18:11:41.758Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 69c17c7cf4197a8e3b7b5a7b
Added to database: 03/23/2026, 17:46:36 UTC
Last enriched: 07/15/2026, 10:51:08 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 167
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