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ImageMagick CVE-2026-86421

| EUVDEUVD-2026-72379 MEDIUM
Uncontrolled Resource Consumption (CWE-400)
2026-09-07 VulnCheck GHSA-vv85-m77w-hhgx
Denial Of Service Red Hat Imagemagick Suse
6.3
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
6.3 MEDIUM
CVSS:4.0/AV:N/AC:H/AT:P/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
3.7 LOW

Network-reachable MSL parser with no auth needed, but AC:H reflects specific payload conditions required; pure DoS memory leak with no C/I impact warrants A:L.

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

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
Patch available
Sep 07, 2026 - 14:02 EUVD
Analysis Generated
Sep 07, 2026 - 13:38 vuln.today
CVE Published
Sep 07, 2026 - 12:53 cve.org
MEDIUM 6.3

DescriptionCVE.org

ImageMagick before 7.1.2-30 and 6.9.13-55 contains a memory leak in the MSL image decoder. A crafted MSL image triggers memory allocation without proper deallocation, allowing an attacker to exhaust memory and cause a denial of service.

AnalysisAI

Memory exhaustion in ImageMagick's MSL image decoder affects versions before 7.1.2-30 (v7 branch) and 6.9.13-55 (v6 branch), enabling unauthenticated network attackers to degrade or crash image-processing services by submitting crafted MSL files that trigger unbounded heap allocation without deallocation. The root cause (CWE-400, Uncontrolled Resource Consumption) lies in the MSL decoder's failure to free allocated memory on certain code paths, allowing cumulative heap exhaustion across repeated requests. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Exploit
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Execution
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Vulnerability AssessmentAI

Exploitation Exploitation requires that an attacker can supply an MSL-format image to a running ImageMagick instance - most commonly a web application or API accepting untrusted file uploads without format filtering. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 6.3 (Medium) accurately captures the bounded scope: only availability of the vulnerable system is affected (VA:L), with no confidentiality or integrity compromise. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Vendor-released patch: upgrade to ImageMagick 7.1.2-30 or later for the v7 branch, or ImageMagick 6.9.13-55 or later for the v6 branch, as documented in GHSA-4jv7-q6xw-6f4x at https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-4jv7-q6xw-6f4x. … Detailed patch versions, workarounds, and compensating controls in full report.
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Vendor StatusVendor

SUSE

Severity: Low
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Performance Computing 12 Affected
SUSE Linux Enterprise Module for Desktop Applications 15 SP7 Affected
SUSE Linux Enterprise Module for Development Tools 15 SP7 Affected
SUSE Linux Enterprise Module for Package Hub 15 SP7 Not-Affected

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CVE-2026-86421 vulnerability details – vuln.today
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