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CVE-2026-119721— Blender before 4.5.15 and 5.x before 5.2.3 Out-of-Bounds Read via blo_bhead_id Accessors

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 之前版本以及 5.x 系列中 5.2.3 之前的版本，在 文件的 访问器中存在越界读取漏洞。该漏洞源于在读取 ID 字段时未进行区块长度检查。攻击者可构造包含短 ID 区块的恶意 文件，当用户浏览或附加该文件时，会引发堆内存越界读取，导致程序崩溃或泄露堆内存内容。

CVSS 6.1 · Medium

Affected Version Matrix 2

VendorProduct Version RangeStatus
Blender Foundation Blender < 4.5.15 affected
5.0.0< 5.2.3 affected
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I. Basic Information for CVE-2026-119721

Vulnerability Information
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Vulnerability Title
Blender before 4.5.15 and 5.x before 5.2.3 Out-of-Bounds Read via blo_bhead_id Accessors
Source: CVE Program / CVE List V5
Vulnerability Description
Blender before 4.5.15 and 5.x before 5.2.3 contains an out-of-bounds read vulnerability in blo_bhead_id_* accessors in readfile.cc that read ID fields without block length checks. Attackers can supply a crafted .blend file with short ID blocks that, when browsed or appended from, causes heap over-reads leading to crashes or heap memory disclosure.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
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-2026-119721

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III. Intelligence Information for CVE-2026-119721

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Other References for CVE-2026-119721 (7)

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-2026-119719 7.8 HIGH Blender before 4.5.15 and 5.x before 5.2.3 Heap Buffer Overflow via Thumbnail Extraction
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-125