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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 Red Hat Imagemagick Suse
4.8
CVSS 4.0 · Vendor: VulnCheck
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Local system access
  2. Delivery
    Craft image with malicious morphology parameters
  3. Exploit
    Deliver to target user
  4. Execution
    User processes image with ImageMagick
  5. Persist
    Trigger off-by-one heap buffer read
  6. Impact
    Application crashes (DoS)

Vulnerability Assessment

Weakness
CWE
CWE-125
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, read limits
MITRE ATT&CK

1 technique across 1 tactic: Collection

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

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Exploitation Conditions

Exploitation requires local system access to place a malicious image where a user will process it, plus user interaction to invoke ImageMagick against that image. No elevated privileges, special configuration, or authentication are needed - the vulnerability exists in default installations. The attack is fundamentally limited by its local-only attack vector (AV:L) and dependency on user action (UI:P), making it unsuitable for remote mass exploitation or automated worm-like propagation.
Impact

The CVSS 4.0 vector (AV:L/AC:L/PR:N/UI:P) indicates this is strictly a local vulnerability requiring user interaction, substantially limiting real-world exploitation scope compared to network-accessible flaws. Impact is confined to low availability (VA:L) with zero confidentiality and integrity impact - this is a crash/denial of service vulnerability, not code execution. The combination of local-only attack surface and required user interaction restricts exploitation to authenticated insiders or scenarios where attackers can socially engineer users into processing untrusted images. No KEV listing or public POC data provided in available references; no evidence of active exploitation in the wild. The relatively low CVSS score (4.8) reflects these limiting factors accurately.
Exploit ScenarioDerived

An attacker with local system access creates an image file with specially-crafted morphology parameters designed to trigger the off-by-one error. The attacker then socially engineers or tricks a legitimate user into processing this malicious image using ImageMagick, such as through a file shared on a network drive or in an email attachment routed to an image processing pipeline. When the user or automated system processes the image, the out-of-bounds heap read is triggered, causing ImageMagick to crash and denying service to legitimate image processing tasks.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Jun 30, 2026

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.

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.

Affected VersionsENISA

ImageMagick 0 <6.9.13-44
ImageMagick 0 <7.1.2-19

Affected Packages

nuget magick.net-q16-anycpu fix: 14.12.0
nuget magick.net-q16-arm64 fix: 14.12.0
nuget magick.net-q16-hdri-anycpu fix: 14.12.0
nuget magick.net-q16-hdri-arm64 fix: 14.12.0
nuget magick.net-q16-hdri-openmp-arm64 fix: 14.12.0
nuget magick.net-q16-hdri-openmp-x64 fix: 14.12.0
nuget magick.net-q16-hdri-x64 fix: 14.12.0
nuget magick.net-q16-hdri-x86 fix: 14.12.0
nuget magick.net-q16-openmp-arm64 fix: 14.12.0
nuget magick.net-q16-openmp-x64 fix: 14.12.0
nuget magick.net-q16-x64 fix: 14.12.0
nuget magick.net-q16-x86 fix: 14.12.0
nuget magick.net-q8-anycpu fix: 14.12.0
nuget magick.net-q8-arm64 fix: 14.12.0
nuget magick.net-q8-openmp-arm64 fix: 14.12.0
nuget magick.net-q8-openmp-x64 fix: 14.12.0
nuget magick.net-q8-x64 fix: 14.12.0
nuget magick.net-q8-x86 fix: 14.12.0
euvd imagemagick fix: 6.9.13-44, 7.1.2-19

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 19 packages in nuget, euvd

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Technical ContextAI · show details

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.

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  • Exploit and PoC references, threat intelligence from 22 sources
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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
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

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

Attack Vector
Local
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
Passive
Vulnerable system: Confidentiality
None
Vulnerable system: Integrity
None
Vulnerable system: Availability
Low
Subsequent system: Confidentiality
None
Subsequent system: Integrity
None
Subsequent system: Availability
None

Lifecycle Timeline

1
Patch available
Jul 01, 2026 - 02:16 EUVD

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.

Threat Intelligence Overview

EPSS Score
0.1%
Top 98% exploitable
Prevalence
Medium
Deployed widely in web hosting, CMS plugins, and server-side image processing, but not universal like core infrastructure.
Data Quality
6 sources
Confidence: High
EUVD NVD CVE.org EPSS Vulnrichment Vendor GitHub VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.1%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation
None
System Exposure· derived
Small
Automatable
No
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

24
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +24
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

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

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Same technique Buffer Overflow

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CVE-2020-0796 CRITICAL POC
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CVE-2019-11043 CRITICAL POC
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CVE-2009-0927 HIGH POC
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CVE-2012-1889 HIGH POC
8.8

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

References

Advisories & patches
ADVISORY https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-q8h3-jv9v-57qx ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-56361 ADVISORY https://ubuntu.com/security/notices/USN-8810-1 ADVISORY https://vuldb.com/vuln/375451 ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:22620/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:2877/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:3023/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:3024/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:3053/ REF https://www.vulncheck.com/advisories/imagemagick-heap-buffer-overflow-via-off-by-one-in-morphology-processing

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