CVE-2026-56362Network attack vector

Heap-buffer over-read via pixel-cache metadata desynchronization

Published Jul 8, 2026 · Updated Jul 8, 2026

Out-of-bounds read in ImageMagick before 7.1.2-15 and 6.9.13-40 allows remote authenticated users to read beyond a heap buffer. OpenPixelCache changes image channel metadata before allocating matching pixel-cache storage, leaving GetPixelIndex to use stale undersized memory. Exploitation requires high privileges and failure of both memory and disk allocation; any writer calling GetPixelIndex then performs the over-read.

CVSS severity2.1
Low
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Out-of-bounds read in ImageMagick before 7.1.2-15 and 6.9.13-40 allows remote authenticated users to read beyond a heap buffer. OpenPixelCache changes image channel metadata before allocating matching pixel-cache storage, leaving GetPixelIndex to use stale undersized memory. Exploitation requires high privileges and failure of both memory and disk allocation; any writer calling GetPixelIndex then performs the over-read.

The record

CVE
CVE-2026-56362
Published
Jul 8, 2026
Updated
Jul 8, 2026
Vendor
ImageMagick Studio LLC
Product
ImageMagick
Classifications
CWE-125, T1499.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jul 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 8, 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 privilegesadmin

What is affected?

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

Published CVSS scores

4.2NIST NVDCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:L
2.1VulnCheckCVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
3.3VulnCheckCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:L

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
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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