What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.4 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-24 · updated 2026-10-25
• Weakness: CWE-120

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.

Affected products

• AcademySoftwareFoundation OpenColorIO: before 2.5.2

References

• https://github.com/AcademySoftwareFoundation/OpenColorIO/releases/tag/v2.5.2
• https://github.com/AcademySoftwareFoundation/OpenColorIO/security/advisories/GHSA-rxp3-rrgx-f547
• https://github.com/AcademySoftwareFoundation/OpenColorIO/security/advisories/GHSA-rxp3-rrgx-f547

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