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ImageMagick CVE-2026-56361

| EUVDEUVD-2026-40445 MEDIUM
Out-of-bounds Read (CWE-125)
2026-06-30 VulnCheck GHSA-4h5w-9gq6-38f8
Buffer Overflow Information Disclosure Imagemagick Red Hat Suse
4.8
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
4.8 MEDIUM
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
3.3 LOW

Local-only vector, low complexity once local access obtained, no privileges required, user must actively process malicious image, low availability impact only, no scope change.

3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
4.0 AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
SUSE
3.3 LOW
AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Red Hat
3.3 LOW
qualitative

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
P
Scope
X

Lifecycle Timeline

2
Patch available
Jul 01, 2026 - 02:16 EUVD
Analysis Generated
Jun 30, 2026 - 23:38 vuln.today

DescriptionCVE.org

ImageMagick before 7.1.2-19 contains an off-by-one error in morphology validation allowing out-of-bounds heap buffer reads. Attackers can trigger heap buffer overflow by providing incorrect morphology parameters causing single pixel memory access violations.

AnalysisAI

Heap buffer out-of-bounds read in ImageMagick before 7.1.2-19 via off-by-one error in morphology validation allows local attackers with user interaction to trigger denial of service. The vulnerability stems from incorrect morphology parameters causing single pixel memory access violations within heap buffers, potentially leading to application crashes or information disclosure through controlled reads of adjacent heap memory.

Technical ContextAI

ImageMagick's morphology processing module contains an off-by-one error in boundary validation that fails to properly constrain heap buffer indices during read operations. CWE-125 (out-of-bounds read) indicates the root cause: inadequate validation of array/buffer indices before access. Morphology operations are used in image transformation pipelines; the vulnerability occurs when parsing specially crafted morphology parameters that bypass validation checks, allowing reads one position beyond the allocated buffer boundary for pixel data.

RemediationAI

Upgrade ImageMagick to version 7.1.2-19 or later to receive the off-by-one validation fix. No vendor-supplied workarounds exist for older versions. If immediate patching is not feasible, restrict image processing to known-trusted sources and disable morphology operations if the feature is not required for your use case. Implement process isolation (run ImageMagick in a sandboxed container or separate user context) to limit availability impact if exploitation occurs. Provide security awareness training to users advising against processing image files from untrusted sources, since user interaction is a required exploitation step.

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Same weakness CWE-125 – Out-of-bounds Read

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Vendor StatusVendor

SUSE

Severity: Low
Product Status
SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise High Performance Computing 15 SP7 SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS Fixed

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CVE-2026-56361 vulnerability details – vuln.today
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