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ImageMagick CVE-2026-55577

| EUVDEUVD-2026-41121 MEDIUM
Improper Check for Unusual or Exceptional Conditions (CWE-754)
2026-07-01 GitHub_M
Buffer Overflow Imagemagick
5.9
CVSS 3.1 · Vendor: GitHub_M
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Severity by source

Vendor (GitHub_M) PRIMARY
5.9 MEDIUM
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
vuln.today AI
5.9 MEDIUM

Network vector reflects attacker-supplied image ingestion; AC:H for required precise crafting; availability-only impact per CVE description with no confirmed code execution.

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

Primary rating from Vendor (GitHub_M).

CVSS VectorVendor: GitHub_M

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

2
Patch available
Jul 01, 2026 - 20:02 EUVD
Analysis Generated
Jul 01, 2026 - 19:37 vuln.today

DescriptionCVE.org

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 6.9.13-51 and 7.1.2-26, a heap buffer overflow occurs in the MVG decoder that could result in an out of bounds write when processing a crafted image. This issue has been fixed in versions 6.9.13-51 and 7.1.2-26.

AnalysisAI

Heap buffer overflow in ImageMagick's MVG decoder allows remote unauthenticated attackers to trigger an out-of-bounds write by supplying a specially crafted image file, resulting in denial of service. Affected are all ImageMagick deployments prior to versions 6.9.13-51 (legacy v6 branch) and 7.1.2-26 (current v7 branch). …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Submit crafted MVG image via upload endpoint
Delivery
ImageMagick invoked with attacker-controlled file
Exploit
MVG decoder fails exceptional-input check
Execution
Heap buffer overflow triggered
Persist
Out-of-bounds write corrupts heap
Impact
ImageMagick process crashes (DoS)
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Vulnerability AssessmentAI

Exploitation The target application must invoke ImageMagick's MVG decoder - either by explicitly accepting MVG files or by allowing ImageMagick to auto-detect format from attacker-supplied input. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The NVD CVSS 3.1 score of 5.9 (AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H) reflects a medium-severity denial-of-service risk. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker uploads or submits a specially crafted MVG image to a web application that uses ImageMagick for image processing - such as a profile picture uploader or document converter. The MVG decoder processes the malicious file, triggering the heap buffer overflow and out-of-bounds write, causing the ImageMagick worker process to crash. …
Remediation Upgrade ImageMagick to version 6.9.13-51 or later on the v6 branch, or to 7.1.2-26 or later on the v7 branch. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-55577 vulnerability details – vuln.today
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