Cyber Resilience

CVE-2026-43906

HighPublic PoC

Published: 14 May 2026

Published
14 May 2026
Modified
15 May 2026
KEV Added
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Patch
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CVSS Score v4 8.5 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0019 8.6th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-43906 is a high-severity Heap-based Buffer Overflow (CWE-122) vulnerability in Openimageio Openimageio. Its CVSS base score is 8.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Client Execution (T1203); ranked at the 8.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

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…

more

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.

CWE(s)
CWE-122

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
Why these techniques?

Heap buffer overflow in image decoder enables direct arbitrary code execution via crafted input files (client-side exploitation).

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

Affected Assets

openimageio
openimageio
3.2.0.2 · ≤ 3.0.18.0 · 3.1.4.0 — 3.1.13.0

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References