--- title: "CVE-2026-63422: OpenImageIO - Out of Bounds Read/Write" description: "OpenImageIO < 3.0.21.0, < 3.1.16.0, and < 3.2.0.3-beta1 contain a heap out-of-bounds write caused by incorrect handling of partial edge-tile rectangles in OpenEXRInput::read_native_tiles(), letting attackers cause memory corruption remotely, exploit requires crafted tiled openexr image with width not multiple of tile width." url: https://panop.io/threat-heartbeat/CVE-2026-63422/ --- # CVE-2026-63422 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 incorrect handling of partial edge-tile rectangles in OpenEXRInput::read\_native\_tiles(), letting attackers cause memory corruption remotely, exploit requires crafted tiled openexr image with width not multiple of tile width. CVSS base score 7.8 /10 High CISA KEV Not listed Public exploit Proof of concept available Authentication Not required EPSS 0.21% chance of exploitation in 30 days [View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-63422) ## Details Type Out of Bounds Read/Write Impact Denial Of Service, Remote Code Execution CVSS vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Published 18 September 2026 Updated 15 October 2026 Weakness [CWE-122](https://cwe.mitre.org/data/definitions/122.html) ## 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 - [https://nvd.nist.gov/vuln/detail/CVE-2026-63422](https://nvd.nist.gov/vuln/detail/CVE-2026-63422) - [https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.16.0](https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.16.0) - [https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-xh5r-whph-qmc5](https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-xh5r-whph-qmc5) - [https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/7303134f13b0f9dc738b8ecabecd8c9f90cbd4c9](https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/7303134f13b0f9dc738b8ecabecd8c9f90cbd4c9) - [https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5295](https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5295) - [https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.0.21.0](https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.0.21.0) [← All CVEs](https://panop.io/threat-heartbeat/) ## What this record can't tell you - Whether you run the affected software, and where - Whether an attacker can actually reach and exploit it - The misconfigurations that never get a CVE number - What it would cost the business, ranked into what to fix first Panop answers these inside your environment, for this CVE and every other finding. [Book a demo](https://panop.io/demo)