Quick answers
- Is CVE-2026-43905 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-43905 being exploited in the wild.
- How severe is CVE-2026-43905?
- High severity, with a CVSS score of 7.8, published 14 May 2026.
- Which products and versions are affected?
- Academy Software Foundation OpenImageIO < 3.0.18.0, < 3.1.13.0.
- Is there a fix for CVE-2026-43905?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-43905 attacked?
- It is attacked with local access, in a software library.
- Am I affected by CVE-2026-43905?
- Check whether you run Academy Software Foundation OpenImageIO at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
An integer overflow vulnerability exists in `jpeg2000input.cpp` within OpenImageIO when compiled with the `USE_OPENJPH` flag. The library calculates the required buffer size for JPEG2000 images using signed 32-bit arithmetic (`w * h * ch * buffer_bpp`). When processing images with very large dimensions, this product can exceed `INT_MAX`, causing a wraparound to zero or a small value. Consequently, `m_buf.resize()` allocates an undersized buffer, while subsequent pixel write loops use the original large dimensions, resulting in a heap buffer overflow. Additionally, the JPEG2000 reader fails to call `check_open()`, bypassing global image size protections. The issue is fixed in versions 3.0.18.0 and 3.1.13.0.
Affected products
- Academy Software Foundation (ASWF) OpenImageIO < 3.0.18.0, < 3.1.13.0
Timeline
- 2026-05-03: advisory: GitHub Security Advisory published
- 2026-05-14: disclosed: CVE published to NVD