CVE-2026-56368Network attack vector

Memory exhaustion via unreleased writer allocations

Published Jun 24, 2026 · Updated Jun 24, 2026

Memory leaks in ImageMagick 6 before 6.9.13-40 and 7 before 7.1.2-15 allow remote attackers to exhaust memory with crafted images. The BGR, CMYK, GRAY, RGB, and YCbCr writers allocate quantum_info but return after OpenBlob fails without destroying it. Repeated jobs reaching this error path retain 160-byte objects, allowing process memory exhaustion and a service interruption.

CVSS severity6.3
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leaks in ImageMagick 6 before 6.9.13-40 and 7 before 7.1.2-15 allow remote attackers to exhaust memory with crafted images. The BGR, CMYK, GRAY, RGB, and YCbCr writers allocate quantum_info but return after OpenBlob fails without destroying it. Repeated jobs reaching this error path retain 160-byte objects, allowing process memory exhaustion and a service interruption.

The record

CVE
CVE-2026-56368
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
ImageMagick Studio LLC
Product
ImageMagick
Classifications
CWE-401, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <6.9.13-40
  2. Affected versionversion=0 <7.1.2-15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ImageMagick Studio LLC · ImageMagickversion=0 <6.9.13-40; version=0 <7.1.2-15

Published CVSS scores

3.7VulnCheckCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
6.3VulnCheckCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
3.7GitHubCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
7.5NISTCVSS:3.1/AV:N/AC:L/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.

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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-401Missing Release of Memory after Effective Lifetime
T1499Endpoint Denial of Service

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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