Quick answers
- Is CVE-2026-50291 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-50291 being exploited in the wild.
- How severe is CVE-2026-50291?
- Medium severity, with a CVSS score of 5.5, published 17 September 2026.
- Which products and versions are affected?
- Academy Software Foundation OpenImageIO before 3.0.16.0 and before 3.1.11.0.
- Is there a fix for CVE-2026-50291?
- 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-2026-50291 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-50291?
- 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
The vulnerability exists in the BMP image decoder (src/bmp.imageio/bmpinput.cpp) where processing a crafted BMP file with an empty color table can lead to an invalid palette read during RLE scanline decoding in BmpInput::read_native_scanline. The root cause is insufficient validation of palette presence before attempting to access palette entries. An attacker can trigger a process crash (denial of service) by supplying a malicious BMP file to oiiotool or any application linked to the library. The vulnerability affects versions prior to 3.0.16.0 and 3.1.11.0, and patches are available in those versions.
Affected products
- Academy Software Foundation OpenImageIO before 3.0.16.0 and before 3.1.11.0
Timeline
- 2026-09-17: disclosed