CVE-2026-55577Network attack vector

Application crash via undersized MVG primitive buffer

Published Jul 1, 2026 · Updated Jul 1, 2026

Heap buffer overflow in ImageMagick 6 before 6.9.13-51 and 7 before 7.1.2-26 allows remote attackers to crash applications. In MagickCore/draw.c, CheckPrimitiveExtent allocates exactly extent PrimitiveInfo entries even though RenderMVGContent expects a terminating entry at that boundary, then fails to stop after resizing errors. Processing a crafted MVG image is required, and the published assessment limits the consequence to an application crash without data disclosure or modification.

CVSS severity5.9
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in ImageMagick 6 before 6.9.13-51 and 7 before 7.1.2-26 allows remote attackers to crash applications. In MagickCore/draw.c, CheckPrimitiveExtent allocates exactly extent PrimitiveInfo entries even though RenderMVGContent expects a terminating entry at that boundary, then fails to stop after resizing errors. Processing a crafted MVG image is required, and the published assessment limits the consequence to an application crash without data disclosure or modification.

The record

CVE
CVE-2026-55577
Published
Jul 1, 2026
Updated
Jul 1, 2026
Vendor
ImageMagick Studio LLC
Product
ImageMagick
Classifications
CWE-754, CWE-787, CWE-755, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 6.9.13-51
  2. Affected versionversion=>= 7.0.1-0, < 7.1.2-26

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ImageMagick Studio LLC · ImageMagickversion=< 6.9.13-51; version=>= 7.0.1-0, < 7.1.2-26

Published CVSS scores

5.9GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-754Improper Check for Unusual or Exceptional Conditions
CWE-787Out-of-bounds Write
CWE-755Improper Handling of Exceptional Conditions
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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