Vulnerability · Published May 14, 2026 · Assigned by GitHub_M
CVE-2026-43903OpenImageIO: SGI RLE decoder heap buffer overflow OIIO_DASSERT bounds checks are no-ops in release builds
High 8.4
In plain English
A high-severity out-of-bounds write in OpenImageIO from AcademySoftwareFoundation. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% 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, sgiinput.cpp:265,274 use OIIO_DASSERT for bounds checking in the RLE decode loop. In release builds, OIIO_DASSERT compiles to ((void)sizeof(x)) (dassert.h:210), making all bounds checks no-ops. A crafted .sgi file with RLE count exceeding scanline width causes heap buffer overflow and crash. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | openimageio | no fix listed | DEBIAN-CVE-2026-43903 |
| Debian:13 | openimageio | no fix listed | DEBIAN-CVE-2026-43903 |
| Debian:14 | openimageio | 3.1.18.0+dfsg-2 | DEBIAN-CVE-2026-43903 |
| Ubuntu:22.04:LTS | openimageio | no fix listed | UBUNTU-CVE-2026-43903 |
| Ubuntu:25.10 | openimageio | no fix listed | UBUNTU-CVE-2026-43903 |
| Ubuntu:26.10 | openimageio | no fix listed | UBUNTU-CVE-2026-43903 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| AcademySoftwareFoundation | OpenImageIO | < 3.0.18.0>= 3.1.4.0-beta, < 3.1.13.0 |
Weakness: CWE-787 · Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N