Answer in brief
CVE-2026-59181 records a Medium severity (CVSS 6.1) vulnerability in OpenImageIO: Stack buffer overflow in OpenImageIO Cineon reader via unchecked numberOfElements. The current sources do not mark it as known exploited. The current feed maps AcademySoftwareFoundation/OpenImageIO (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps AcademySoftwareFoundation/OpenImageIO (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:openimageio:openimageio:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:openimageio:openimageio:3.2.0.0:dev:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:openimageio:openimageio:3.2.0.2:dev:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| AcademySoftwareFoundation/OpenImageIOgeneric | <3.0.20.0 || >=3.1.0.0 <3.1.15.0 || >=3.2.0.0-dev <3.2.0.3-beta1 | 3.0.20.0, 3.1.15.0, 3.2.0.3-beta1 |
Published upstream
Sep 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 29, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 18, 2026
OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.20.0, 3.1.15.0, and 3.2.0.3-beta1, A crafted cineon file can supply a numberofelements value greater than the format maximum of eight. cineoninput::open() uses that unchecked value as the loop bound while filling the fixed strings[8] array, writing pointers beyond the stack buffer and into adjacent state, resulting in memory corruption and denial of service. The affected implementation is identified by src/cineon.imageio/cineoninput.cpp, CineonInput::open(), numberOfElements, and strings[8], which define the relevant source path, functions, state, and trigger. This issue is fixed in versions 3.0.20.0, 3.1.15.0, and 3.2.0.3-beta1.
Quoted source text, attributed separately from HOL analysis.