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CVE-2026-42450— OpenColorIO vulnerable to stack buffer overflow via unbounded `sscanf %s` in Spi3D (.spi3d) LUT parser

Quick assessment

Affected
AcademySoftwareFoundation OpenColorIO
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.

Academy Software Foundation OpenColorIO是Academy Software Foundation基金会开源的一款用于统一色彩管理与色彩转换流程的开源色彩配置框架。 Academy Software Foundation OpenColorIO 2.5.2之前版本存在缓冲区错误漏洞，该漏洞源于在解析LUT数据行时，使用sscanf将数据读入64字节栈缓冲区时存在缓冲区溢出，可能导致攻击者通过特制.spi3d文件溢出约4000字节。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
AcademySoftwareFoundation OpenColorIO < 2.5.2 affected
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I. Basic Information for CVE-2026-42450

Vulnerability Information
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Vulnerability Title
OpenColorIO vulnerable to stack buffer overflow via unbounded `sscanf %s` in Spi3D (.spi3d) LUT parser
Source: CVE Program / CVE List V5
Vulnerability Description
OpenColorIO is a color management framework for visual effects and animation. Prior to version 2.5.2, `FileFormatSpi3D.cpp:163` uses `sscanf` with `%s` into 64-byte stack buffers when parsing LUT data lines. Input comes from `lineBuffer[4096]`, so a crafted .spi3d file can overflow by ~4000 bytes on non-Windows. Version 2.5.2 fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
Academy Software Foundation OpenColorIO 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Academy Software Foundation OpenColorIO是Academy Software Foundation基金会开源的一款用于统一色彩管理与色彩转换流程的开源色彩配置框架。 Academy Software Foundation OpenColorIO 2.5.2之前版本存在缓冲区错误漏洞，该漏洞源于在解析LUT数据行时，使用sscanf将数据读入64字节栈缓冲区时存在缓冲区溢出，可能导致攻击者通过特制.spi3d文件溢出约4000字节。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
AcademySoftwareFoundation OpenColorIO < 2.5.2 -

II. Public POCs for CVE-2026-42450

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III. Intelligence Information for CVE-2026-42450

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Vendor Advisories for CVE-2026-42450 (1)

Vendor Pages for CVE-2026-42450 (1)

IV. Related Vulnerabilities

Same product: OpenColorIO
Same vendor: AcademySoftwareFoundation
Same weakness: CWE-120

V. Comments for CVE-2026-42450

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