CVE-2026-119719
Blender before 4.5.15 and 5.x before 5.2.3 Heap Buffer Overflow via Thumbnail Extraction
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
0th
Blender before 4.5.15 and 5.x before 5.2.3 contains a heap buffer overflow vulnerability in the blend file thumbnail extractor caused by 32-bit integer overflow in thumb_data_vertical_flip(). Attackers can craft a .blend file with malicious TEST block dimensions that trigger an out-of-bounds write when blender-thumbnailer or the Windows shell extension previews it, causing crashes or code execution.
| CWE | CWE-190 |
| Vendor | blender foundation |
| Product | blender |
| Published | Oct 30, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Blender Foundation / Blender
0 < 4.5.15 5.0.0 < 5.2.3
References
projects.blender.org: https://projects.blender.org/blender/blender/pulls/164279 projects.blender.org: https://projects.blender.org/blender/blender/commit/d723c68112d216099c9b24dab5c8440bab7add08 projects.blender.org: https://projects.blender.org/blender/blender/commit/71c10a0217d5e331b215b76773ad23b64974bd97 projects.blender.org: https://projects.blender.org/blender/blender vulncheck.com: https://www.vulncheck.com/advisories/blender-before-4.5.15-and-5-x-before-5.2.3-heap-buffer-overflow-via-thumbnail-extraction
Credits
Tristan Madani