Buffer overflow in Academysoftwarefoundation Openimageio
CVE-2026-63419
OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.21.0, 3.1.16.0, and 3.2.0.3-beta1, A zbuffer-only tiled iff is exposed with a 16-bit public imagespec while the decoder retains a 32-bit internal pixel size. iffinput::read_native_tile() copies according to m_header.pixel_bytes() rather than imagespec::tile_bytes(true), and a failed read can leave m_buf nonempty so a later call copies partially initialized data into the undersized caller buffer, resulting in a heap out-of-bounds write and memory corruption. The affected implementation is identified by src/iff.imageio/iffinput.cpp, IffInput::read_native_tile(), ImageSpec::tile_bytes(true), m_header.pixel_bytes(), ZBUFFER, and m_buf, which define the relevant source path, functions, state, and trigger. This issue is fixed in versions 3.0.21.0, 3.1.16.0, and 3.2.0.3-beta1.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (12.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 13th percentile — 12.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Academysoftwarefoundation Openimageio — versions < 3.0.21.0, >= 3.1.0.0, < 3.1.16.0, >= 3.2.0.0-dev, < 3.2.0.3-beta1
- Openimageio — versions 3.2.0.0, 3.2.0.2
Weakness classification (CWE)
References
- github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-w6wc-… (Exploit, Mitigation, Vendor Advisory)
- github.com/AcademySoftwareFoundation/OpenImageIO/pull/5268 (Patch, Issue Tracking)
- github.com/AcademySoftwareFoundation/OpenImageIO/commit/9cda48b150294c7f024e680… (Patch)
- github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.0.21.0 (Release Notes)
- github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.16.0 (Release Notes)
Frequently asked questions
- What is CVE-2026-63419?
- CVE-2026-63419 is a high-severity vulnerability in Academysoftwarefoundation Openimageio, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2026-09-18.
- How severe is CVE-2026-63419?
- High severity. CVSS v3 base score is 7.8 out of 10.