CVE-2026-119719

High

Description

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.

SeverityHigh

CVSS7.8

Exploit probability—

ProductBlender

PublishedOct 30, 2026

First seenNov 4, 2026

Weakness typeCWE-190Integer overflow

How to fix

Update

blender blender4.5.15, 5.2.3 or later

Patches

Affected products

Product	Affected versions	Fixed in
blender blender	v < 4.5.15, 5.0.0 ≤ v < 5.2.3	4.5.15, 5.2.3

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