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

Quick assessment

Affected
Blender Foundation Blender
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Blender 4.5.15 之前的版本以及 5.x 系列中 5.2.3 之前的版本，在 blend 文件缩略图提取器中存在堆缓冲区溢出漏洞。该漏洞源于 函数中的 32 位整数溢出。攻击者可构造包含恶意 TEST 块尺寸信息的 .blend 文件，当 或 Windows 外壳扩展在预览该文件时，将触发越界写入，导致程序崩溃或代码执行。

CVSS 7.8 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-119719

Vulnerability Information
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Vulnerability Title
Blender before 4.5.15 and 5.x before 5.2.3 Heap Buffer Overflow via Thumbnail Extraction
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Blender Foundation Blender 0 ~ 4.5.15 -

II. Public POCs for CVE-2026-119719

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-119719

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Other References for CVE-2026-119719 (5)

Same Patch Batch · Blender Foundation · 2026-10-30 · 5 CVEs total

CVE-2026-119718 7.8 HIGH Blender before 4.5.15 and 5.x before 5.2.3 Heap Buffer Overflow via Point Cache
CVE-2026-119722 7.8 HIGH Blender before 4.5.15 and 5.x before 5.2.3 Heap Out-of-Bounds Access via read_struct()
CVE-2026-119721 6.1 MEDIUM Blender before 4.5.15 and 5.x before 5.2.3 Out-of-Bounds Read via blo_bhead_id Accessors
CVE-2026-119720 5.5 MEDIUM Blender before 4.5.15 and 5.x before 5.2.3 Out-of-Bounds Read via GLOB Block

IV. Related Vulnerabilities

Same product: Blender
Same vendor: Blender Foundation
Same weakness: CWE-190