CVE-2026-55059: CWE-787: Out-of-bounds Write in AcademySoftwareFoundation openexr
Description
OpenEXR versions prior to 3.2.10, 3.3.12, and 3.4.13 contain a heap out-of-bounds write vulnerability in the SampleCountChannel::set function. This occurs because the Y coordinate is incorrectly computed using dataWindow.min.x instead of dataWindow.min.y, leading to potential heap corruption and process crashes when handling deep image data. The issue is reachable via the public DeepImage API and has been fixed in the specified versions.
CVSS v3.1
Score 6.1medium
Affected software
AcademySoftwareFoundation
openexr
pkg:github/academysoftwarefoundation/openexrRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in AcademySoftwareFoundation's OpenEXR involves a heap out-of-bounds write in the Imf_4_0::SampleCountChannel::set method. The flaw arises from using dataWindow.min.x instead of dataWindow.min.y to compute the Y coordinate for sample count rows, which can cause writes before the allocated _numSamples buffer when min.x differs from min.y. This can lead to heap corruption and process crashes. The vulnerability affects versions prior to 3.2.10, 3.3.12, and 3.4.13 and is exploitable through the DeepImage API. The issue has been addressed in the fixed versions.
Potential Impact
This vulnerability can cause heap corruption and process crashes due to out-of-bounds writes in the heap memory. There is no indication of confidentiality or integrity impact, but availability is affected due to potential crashes. The CVSS score is 6.1 (medium severity), indicating a moderate impact primarily on availability.
Mitigation Recommendations
A fix is available in OpenEXR versions 3.2.10, 3.3.12, and 3.4.13. Users should upgrade to these or later versions to remediate the vulnerability. No other mitigation or workaround is indicated in the available data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-16T14:33:35.709Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a8ce3d2acd9273b495f0b8b
Added to database: 08/25/2026, 00:37:38 UTC
Last enriched: 09/10/2026, 20:48:33 UTC
Last updated: 10/08/2026, 18:48:46 UTC
Views: 72
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