How severe is CVE-2026-43903?

CVE-2026-43903 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-2026-43903 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-43903?

CVE-2026-43903 affects Openimageio. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-43903?

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-2026-43903 have an EU (EUVD) identifier?

Yes. CVE-2026-43903 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30387.

When was CVE-2026-43903 published?

CVE-2026-43903 was published on 2026-05-14 and last updated on 2026-06-17.

CVE-2026-43903

CVE-2026-43903 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-787.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v4: 8.4
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30387
Weakness: CWE-787
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, sgiinput.cpp:265,274 use OIIO_DASSERT for bounds checking in the RLE decode loop. In release builds, OIIO_DASSERT compiles to ((void)sizeof(x)) (dassert.h:210), making all bounds checks no-ops. A crafted .sgi file with RLE count exceeding scanline width causes heap buffer overflow and crash. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.

Frequently asked questions

What is CVE-2026-43903?: 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, sgiinput.cpp:265,274 use OIIO_DASSERT for bounds checking in the RLE decode loop. In release builds, OIIO_DASSERT compiles to ((void)sizeof(x)) (dassert.h:210), making all bounds checks no-ops. A crafted .sgi file with RLE count exceeding scanline width causes heap buffer overflow and crash. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.
How severe is CVE-2026-43903?: CVE-2026-43903 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-2026-43903 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-43903?: CVE-2026-43903 affects Openimageio. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-43903?: 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-2026-43903 have an EU (EUVD) identifier?: Yes. CVE-2026-43903 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30387.
When was CVE-2026-43903 published?: CVE-2026-43903 was published on 2026-05-14 and last updated on 2026-06-17.

References

https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-jg3q-vm3q-2j35

Affected products (1)

cpe:2.3:a:openimageio:openimageio:*:*:*:*:*:*:*:*

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