CVE-2026-56372

Service interruption via unsafe magnify defaults

Published Jul 11, 2026 · Updated Jul 11, 2026

Heap buffer overflow in ImageMagick before 7.1.2-19 allows local users to interrupt image processing via an unrecognized magnify method. MagnifyImage in MagickCore/resize.c leaves magnification and width at undersized defaults for an unrecognized magnify:method, causing a four-byte read past a heap allocation. Triggering requires an operator or application to process attacker-controlled magnify input, and the published assessment limits the consequence to availability.

CVSS severity4.8
Medium
EPSS probability0.20%
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 before 7.1.2-19 allows local users to interrupt image processing via an unrecognized magnify method. MagnifyImage in MagickCore/resize.c leaves magnification and width at undersized defaults for an unrecognized magnify:method, causing a four-byte read past a heap allocation. Triggering requires an operator or application to process attacker-controlled magnify input, and the published assessment limits the consequence to availability.

The record

CVE
CVE-2026-56372
Published
Jul 11, 2026
Updated
Jul 11, 2026
Vendor
ImageMagick Studio LLC
Product
ImageMagick
Classifications
CWE-122
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 11, 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 <7.1.2-19

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

ImageMagick Studio LLC · ImageMagickversion=0 <7.1.2-19

Published CVSS scores

4.8VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
9.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
3.3VulnCheckCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
3.3GitHubCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow

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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