Heap Buffer Overflow in Blender Affects Thumbnail Extraction
CVE-2026-119719

8.5HIGH

Key Information:

Vendor

Blender Foundation

Status
Blender
Vendor
CVE Published:
30 October 2026

What is CVE-2026-119719?

Blender versions prior to 4.5.15 and 5.x before 5.2.3 are susceptible to a heap buffer overflow caused by a 32-bit integer overflow within the thumbnail extraction process. When a specially crafted .blend file is processed by the blender-thumbnailer or during Windows shell extension previews, it may lead to out-of-bounds writes. This vulnerability potentially allows attackers to execute arbitrary code or crash the application.

Affected Version(s)

Blender 0 < 4.5.15

Blender 5.0.0 < 5.2.3

References

https://projects.blender.org/blender/blender/pulls/164279
patch
https://projects.blender.org/blender/blender/commit/d723c...
patch
https://projects.blender.org/blender/blender/commit/71c10...
patch

CVSS V4

Score:
8.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Tristan Madani
.