CVE-2026-63638 OpenImageIO - Out of Bounds Read/Write

OpenImageIO < 3.0.21.0, < 3.1.16.0, and < 3.2.0.3-beta1 contain a heap out-of-bounds write caused by improper bit depth handling in cineoninput::read_native_scanline, letting attackers cause memory corruption remotely, exploit requires crafted cineon image.

CVSS base score 8.3 /10
High
CISA KEV
Not listed
Public exploit
Proof of concept available
Authentication
Not required
EPSS
0.46% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out of Bounds Read/Write
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H
Published
18 September 2026
Updated
15 October 2026
Weakness
CWE-787

Vendor fix

Update to versions 3.0.21.0, 3.1.16.0, or 3.2.0.3-beta1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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