# CVE-2026-119719: Blender before 4.5.15 and 5.x before 5.2.3 Heap Buffer Overflow via Thumbnail Extraction

CVE-2026-119719 is fixed in blender on 1 platform by blender 5.2.3 (version 5.2.3), released October 22, 2026. 2 other affected products have no fix yet. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-119719
- Priority: High
- CVSS: 8.5
- EPSS: 0.0016
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 30, 2026
- Weakness: CWE-190: Integer Overflow or Wraparound
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-119719

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | blender | 5.2.3 | [blender 5.2.3](https://patchblox.com/security/data/fix/windows-app/blenderfoundation.blender-5.2.3.md) | Oct 22, 2026 |

## No fix yet

| Platform | Product | Status |
|---|---|---|
| Windows apps | blender | no-fix |
| Windows apps | blender | no-fix |

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Data as of 2026-11-10T01:44:33Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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