CVE-2026-43907
OpenImageIO: Integer overflow in QueryRGBBufferSizeInternal leads to heap out-of-bounds write in DPX decoder (kCbYCr and kABGR)
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, a signed integer overflow in QueryRGBBufferSizeInternal() in DPXColorConverter.cpp leads to a heap-based out-of-bounds write when processing crafted DPX image files. The function computes buffer sizes using 32-bit signed integer arithmetic with negative multipliers (e.g., pixels * -3 * bytes for kCbYCr descriptors and pixels * -4 * bytes for kABGR descriptors), where a negative result is used as an in-band signal that no separate buffer is needed. When the pixel count is sufficiently large, the multiplication overflows INT_MIN and wraps to a small positive value. The caller in dpxinput.cpp interprets this positive value as a required buffer size, allocates an undersized heap buffer via m_decodebuf.resize(), and then writes the full image data into it via fread, resulting in a heap buffer overflow. An attacker can exploit this by crafting a DPX file that triggers the overflow, causing a denial of service (crash) or potentially arbitrary code execution through heap corruption in any application that reads pixel data using OpenImageIO. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.
INFO
Published Date :
May 14, 2026, 8:17 p.m.
Last Modified :
Oct. 25, 2026, 11:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE |
Solution
- Update OpenImageIO to version 3.0.18.0 or later.
- Update OpenImageIO to version 3.1.13.0 or later.
- Validate DPX file processing after updates.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-43907.
| URL | Resource |
|---|---|
| https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-cq46-hp4h-cvfr | Exploit Vendor Advisory |
| https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-cq46-hp4h-cvfr | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-43907 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-43907
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-43907 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-43907 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 25, 2026
Action Type Old Value New Value Added Translation Title: OpenImageIO de AcademySoftwareFoundation, Description: OpenImageIO es un conjunto de herramientas para leer, escribir y manipular archivos de imagen de cualquier formato de archivo de imagen relevante para VFX / animación. Antes de 3.0.18.0 y 3.1.13.0, un desbordamiento de entero con signo en QueryRGBBufferSizeInternal() en DPXColorConverter.cpp conduce a una escritura fuera de límites basada en el heap al procesar archivos de imagen DPX manipulados. La función calcula los tamaños de búfer utilizando aritmética de enteros con signo de 32 bits con multiplicadores negativos (por ejemplo, píxeles * -3 * bytes para descriptores kCbYCr y píxeles * -4 * bytes para descriptores kABGR), donde un resultado negativo se utiliza como una señal en banda de que no se necesita un búfer separado. Cuando el recuento de píxeles es suficientemente grande, la multiplicación desborda INT_MIN y se ajusta a un pequeño valor positivo. El llamador en dpxinput.cpp interpreta este valor positivo como un tamaño de búfer requerido, asigna un búfer de heap de tamaño insuficiente a través de m_decodebuf.resize(), y luego escribe los datos completos de la imagen en él a través de fread, lo que resulta en un desbordamiento de búfer de heap. Un atacante puede explotar esto creando un archivo DPX que desencadena el desbordamiento, causando una denegación de servicio (bloqueo) o potencialmente ejecución de código arbitrario a través de la corrupción del heap en cualquier aplicación que lea datos de píxeles usando OpenImageIO. Esta vulnerabilidad se corrige en 3.0.18.0 y 3.1.13.0. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'AcademySoftwareFoundation', 'product': 'OpenImageIO', 'versions': [{'status': 'affected', 'version': '< 3.0.18.0'}, {'status': 'affected', 'version': '>= 3.1.4.0-beta, < 3.1.13.0'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-43907', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-05-14T19:49:04.586037Z'} -
Initial Analysis by [email protected]
May. 15, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:openimageio:openimageio:*:*:*:*:*:*:*:* versions up to (excluding) 3.0.18.0 *cpe:2.3:a:openimageio:openimageio:*:*:*:*:*:*:*:* versions from (including) 3.1.4.0 up to (excluding) 3.1.13.0 *cpe:2.3:a:openimageio:openimageio:3.2.0.2:dev:*:*:*:*:*:* Added Reference Type CISA-ADP: https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-cq46-hp4h-cvfr Types: Exploit, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-cq46-hp4h-cvfr Types: Exploit, Vendor Advisory -
New CVE Received by [email protected]
May. 14, 2026
Action Type Old Value New Value Added 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, a signed integer overflow in QueryRGBBufferSizeInternal() in DPXColorConverter.cpp leads to a heap-based out-of-bounds write when processing crafted DPX image files. The function computes buffer sizes using 32-bit signed integer arithmetic with negative multipliers (e.g., pixels * -3 * bytes for kCbYCr descriptors and pixels * -4 * bytes for kABGR descriptors), where a negative result is used as an in-band signal that no separate buffer is needed. When the pixel count is sufficiently large, the multiplication overflows INT_MIN and wraps to a small positive value. The caller in dpxinput.cpp interprets this positive value as a required buffer size, allocates an undersized heap buffer via m_decodebuf.resize(), and then writes the full image data into it via fread, resulting in a heap buffer overflow. An attacker can exploit this by crafting a DPX file that triggers the overflow, causing a denial of service (crash) or potentially arbitrary code execution through heap corruption in any application that reads pixel data using OpenImageIO. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H Added CWE CWE-787 Added CWE CWE-190 Added Reference https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-cq46-hp4h-cvfr -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 14, 2026
Action Type Old Value New Value Added Reference https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-cq46-hp4h-cvfr