Vulnerability · Published May 14, 2026 · Assigned by GitHub_M
CVE-2026-43905OpenImageIO: JPEG2000 (OpenJPH) signed integer overflow in buffer allocation
High 7.1
In plain English
A high-severity integer overflow in OpenImageIO from AcademySoftwareFoundation. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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, jpeg2000input.cpp:395 computes buffer size as const int bufsize = w * h * ch * buffer_bpp using signed 32-bit arithmetic. When the product exceeds INT_MAX, the result wraps to 0 or a small value. m_buf.resize() allocates an undersized buffer, and subsequent pixel write loops cause heap overflow. Conditional on USE_OPENJPH build flag. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | openimageio | no fix listed | DEBIAN-CVE-2026-43905 |
| Debian:14 | openimageio | 3.1.18.0+dfsg-2 | DEBIAN-CVE-2026-43905 |
| Ubuntu:22.04:LTS | openimageio | no fix listed | UBUNTU-CVE-2026-43905 |
| Ubuntu:24.04:LTS | openimageio | no fix listed | UBUNTU-CVE-2026-43905 |
| Ubuntu:25.10 | openimageio | no fix listed | UBUNTU-CVE-2026-43905 |
| Ubuntu:26.04:LTS | openimageio | no fix listed | UBUNTU-CVE-2026-43905 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| AcademySoftwareFoundation | OpenImageIO | < 3.0.18.0>= 3.1.4.0-beta, < 3.1.13.0 |
Weakness: CWE-190 · Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N