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CVE-2026-43909

Openimageio buffer overflow

8.8 HIGHPublic exploitEPSS 0.45%
  1. Published14 May 2026

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 signed 32-bit integer overflow in the loop index expression i * 4 inside SwapRGBABytes() causes the function to compute a large negative pointer offset when processing kABGR DPX images with large dimensions. The immediate crash is an out-of-bounds read (the memcpy at line 45 reads from &input[i * 4] first), but the subsequent write operations at lines 46–49 target the same wrapped offset — making this a combined OOB read+write primitive. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Openimageio≥ 3.1.4.0 < 3.1.13.0 · < 3.0.18.0 · 3.2.0.0 · 3.2.0.2

Remediation

Fixed in
Openimageio≥ 3.1.13.0

References

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Frequently asked

Is CVE-2026-43909 being actively exploited?

CVE-2026-43909 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.45%.

How severe is CVE-2026-43909?

CVE-2026-43909 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 0.45% probability of exploitation.

Which products are affected by CVE-2026-43909?

Affected products include Openimageio.

How do I fix CVE-2026-43909?

Upgrade affected software to a fixed version, for example Openimageio 3.1.13.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-43909 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.