How severe is CVE-2026-43906?

CVE-2026-43906 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-43906 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-43906?

CVE-2026-43906 primarily affects Openimageio. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-43906?

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-2026-43906 have an EU (EUVD) identifier?

Yes. CVE-2026-43906 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30404.

When was CVE-2026-43906 published?

CVE-2026-43906 was published on 2026-05-14 and last updated on 2026-06-17.

CVE-2026-43906

CVE-2026-43906 is a high-severity vulnerability in Openimageio with a CVSS 3.x base score of 7.8. 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-122.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v4: 8.5
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30404
Weakness: CWE-122
Affected product: Openimageio
Published: 2026-05-14
Last modified: 2026-06-17

Description

OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.18.0 and 3.1.13.0, a heap-based buffer overflow in the HEIF decoder of OpenImageIO allows out-of-bounds writes via crafted images due to a subimage metadata mismatch, leading to memory corruption and potential code execution. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.

Frequently asked questions

What is CVE-2026-43906?: OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.18.0 and 3.1.13.0, a heap-based buffer overflow in the HEIF decoder of OpenImageIO allows out-of-bounds writes via crafted images due to a subimage metadata mismatch, leading to memory corruption and potential code execution. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.
How severe is CVE-2026-43906?: CVE-2026-43906 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-43906 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-43906?: CVE-2026-43906 primarily affects Openimageio. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-43906?: 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-2026-43906 have an EU (EUVD) identifier?: Yes. CVE-2026-43906 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30404.
When was CVE-2026-43906 published?: CVE-2026-43906 was published on 2026-05-14 and last updated on 2026-06-17.

References

https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-gmrp-x952-3m66

Affected products (2)

cpe:2.3:a:openimageio:openimageio:*:*:*:*:*:*:*:*
cpe:2.3:a:openimageio:openimageio:3.2.0.2:dev:*:*:*:*:*:*

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