Magick.NET Q16 AnyCPU: ImageMagick has out-of-bounds access in ConnectedComponentsImage() via CLI-controlled connected-components:* artifacts (CVE-2026-56370)
Description
CVE-2026-56370 is a low severity vulnerability in Magick.NET Q16 AnyCPU where an out-of-bounds access occurs in the ConnectedComponentsImage() function when the connected-components:* define specifies an invalid index, causing an access violation.
CVSS v3.1
Score 3.3low
Affected software
pkg:deb/ubuntu/imagemagick?arch=source&distro=esm-apps/jammypkg:deb/ubuntu/imagemagick?arch=source&distro=esm-apps/noblepkg:deb/ubuntu/imagemagick?arch=source&distro=questingpkg:deb/ubuntu/imagemagick?arch=source&distro=esm-apps/resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in Magick.NET Q16 AnyCPU arises from improper bounds checking in the ConnectedComponentsImage() function. Specifically, when the connected-components:* define is controlled via the command line interface and specifies an invalid index, it triggers an out-of-bounds memory access leading to an access violation. This is identified as CWE-125 (Out-of-bounds Read) and CWE-787 (Out-of-bounds Write). The CVSS v3.1 base score is 3.3, indicating low severity, with an attack vector limited to local access and requiring user interaction.
Potential Impact
The impact is limited to causing an access violation due to out-of-bounds memory access, which affects availability (denial of service). There is no confidentiality or integrity impact reported. The attack requires local access and user interaction, limiting the exploitation scope.
Mitigation Recommendations
A patch is available for this vulnerability. Users should apply the official fix provided by the vendor or their distribution to remediate the issue. No additional mitigation steps are indicated or required beyond applying the patch.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-56370
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:Pro:22.04:LTS","Ubuntu:Pro:24.04:LTS","Ubuntu:25.10","Ubuntu:Pro:26.04:LTS"]
- Cvss Version
- 3.1
Threat ID: 6a8effe8acd9273b490787db
Added to database: 08/26/2026, 15:02:00 UTC
Last enriched: 09/19/2026, 02:11:02 UTC
Last updated: 10/10/2026, 18:48:20 UTC
Views: 63
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