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TI-2026-76170 Aliases CVE-2026-112018GHSA-6vjv-6x7m-3wjx

Heap out-of-bounds write in cgltf accessor unpacking

Priority HIGH 67CWE-787Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
Present
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

cgltf through 1.15 contains a heap out-of-bounds write in cgltf_accessor_unpack_floats() caused by unchecked sparse accessor indices. An attacker who supplies a crafted glTF or GLB file with large sparse indices can write outside the output buffer, corrupting heap memory and crashing applications. Code execution may be possible when cgltf_validate() is not called. The CWE is CWE-787.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00199 9th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
jkuhlmanncgltfup to 1.15—No fix listedCNA
  • cgltf Vendorjkuhlmann Affected up to 1.15 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for cgltf.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

  1. 2026-10-18 Threatist record created from CVE-2026-112018
  2. 2026-10-18 Alias added: GHSA-6vjv-6x7m-3wjx
  3. 2026-10-19 Priority changed: MEDIUM → LOW
  4. 2026-10-20 CISA SSVC decision points changed
  5. 2026-10-20 Priority changed: LOW → HIGH

References

Other 3

  • TI-2026-25308 jkuhlmann / cgltf <= 1.15 Sparse Accessor Validation Integer Overflow CVSS 4.0MEDIUM 6.9
  • TI-2026-76171 Heap out-of-bounds read in cgltf accessor unpacking CVSS 4.0MEDIUM 6.9
  • TI-2026-52801 cgltf 1.15 Integer Overflow via cgltf_validate() Accessor Bounds Check CVSS 4.0MEDIUM 6.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences