How severe is CVE-2026-42450?

CVE-2026-42450 has a CVSS 4.0 base score of 8.4, rated high severity.

Is CVE-2026-42450 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-42450?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-42450 have an EU (EUVD) identifier?

Yes. CVE-2026-42450 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38769.

When was CVE-2026-42450 published?

CVE-2026-42450 was published on 2026-06-24 and last updated on 2026-06-25.

CVE-2026-42450

CVE-2026-42450 is a high-severity vulnerability with a CVSS 4.0 base score of 8.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-120.

Key facts

Severity: High (CVSS 4.0 base score 8.4)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-38769
Weakness: CWE-120
Published: 2026-06-24
Last modified: 2026-06-25

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.

Frequently asked questions

What is CVE-2026-42450?: 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.
How severe is CVE-2026-42450?: CVE-2026-42450 has a CVSS 4.0 base score of 8.4, rated high severity.
Is CVE-2026-42450 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-42450?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-42450 have an EU (EUVD) identifier?: Yes. CVE-2026-42450 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38769.
When was CVE-2026-42450 published?: CVE-2026-42450 was published on 2026-06-24 and last updated on 2026-06-25.

References

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