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ImageMagick CVE-2026-56371

| EUVDEUVD-2026-38439 MEDIUM
Memory Leak (CWE-401)
2026-06-23 VulnCheck GHSA-98gv-6gmj-cm6m
Information Disclosure Imagemagick
6.9
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
6.9 NONE
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/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
5.3 MEDIUM

Network-triggerable via file upload with no auth required; availability impact is Low because memory exhaustion requires sustained repeated requests, not a single shot.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
4.0 AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

4
CVSS changed
Jul 02, 2026 - 16:37 NVD
6.9 (MEDIUM)
Patch available
Jun 23, 2026 - 14:17 EUVD
Source Code Evidence Fetched
Jun 23, 2026 - 13:11 vuln.today
Analysis Generated
Jun 23, 2026 - 13:11 vuln.today

DescriptionCVE.org

ImageMagick before 7.1.2-15 and 6.9.13-40 contains a memory leak in coders/txt.c when processing TXT files with texture attributes: the texture object allocated via ReadImage is not released when GetTypeMetrics fails, leaking memory each time a crafted TXT file with a texture attribute is processed.

AnalysisAI

Memory exhaustion in ImageMagick's TXT file coder (coders/txt.c) leaks heap allocations each time a crafted TXT file carrying a texture attribute is processed and GetTypeMetrics subsequently fails. Affected are ImageMagick before 7.1.2-15 and 6.9.13-40, and transitively Magick.NET NuGet packages before 14.10.3. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Recon
Supply crafted TXT file with texture attribute
Delivery
ImageMagick TXT coder calls ReadImage() for texture
Exploit
GetTypeMetrics fails on font lookup
Install
Error exit path skips DestroyImage()
C2
Heap allocation permanently leaked
Execute
Repeat at scale to exhaust process memory
Impact
Service crash or OOM termination
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Vulnerability AssessmentAI

Exploitation Exploitation requires that the target system processes TXT files through ImageMagick and that those TXT files contain a `texture` attribute - a non-default, optional feature of the TXT coder. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The provided CVSS 4.0 vector (all impacts scored N) appears to be an unscored placeholder inconsistent with a memory leak vulnerability that can cause process-level availability degradation - this discrepancy should be noted and the vendor-published vector should not be used for prioritization. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker submits a series of crafted TXT files, each containing a `texture` attribute referencing a resource that causes GetTypeMetrics to fail, to a web application that passes user uploads to ImageMagick for processing. Each request causes a heap allocation to leak within the ImageMagick worker process; after sufficient iterations, the process's resident memory grows until it is terminated by the OS OOM killer or crashes, denying service to legitimate users. …
Remediation Upgrade ImageMagick to version 7.1.2-15 or later (7.x branch) or 6.9.13-40 or later (6.x branch), as documented in the upstream security advisory at https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-3q5f-gmjc-38r8 and patched in commit e6394098af39a9689bb5f0b4eb6a9968e449a8d3. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-56371 vulnerability details – vuln.today
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