Bug 2564160 (CVE-2026-119719)

Summary: CVE-2026-119719 blender: blender: Arbitrary code execution via thumbnail extractor integer overflow
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Blender. This vulnerability may allow arbitrary code execution or cause an application crash resulting in a Denial of Service (DoS). By convincing a user to preview a specially crafted blend file with invalid image dimensions, an attacker can trigger an integer overflow in the thumbnail extractor. This condition leads to an out-of-bounds memory write, potentially enabling unauthorized code execution in the context of the user.
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Bug Depends On: 2565454, 2565455, 2565456, 2565457    
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Description OSIDB Bzimport 2026-10-30 16:08:30 UTC
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.