CVE-2026-66011

Resource exhaustion via malformed CLI options

Published Jul 25, 2026 · Updated Jul 25, 2026

Memory leakage in ImageMagick before 7.1.2-27 allows local users to consume process memory by supplying invalid magick CLI options. The upstream fix modifies option-handling paths in MagickWand and property processing in MagickCore, but the advisory does not identify the unreleased allocation. Execution requires a user or calling application to invoke the local CLI; leaked memory is reclaimed when each command process exits, limiting persistent impact.

CVSS severity4.8
Medium
EPSS probability0.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leakage in ImageMagick before 7.1.2-27 allows local users to consume process memory by supplying invalid magick CLI options. The upstream fix modifies option-handling paths in MagickWand and property processing in MagickCore, but the advisory does not identify the unreleased allocation. Execution requires a user or calling application to invoke the local CLI; leaked memory is reclaimed when each command process exits, limiting persistent impact.

The record

CVE
CVE-2026-66011
Published
Jul 25, 2026
Updated
Jul 25, 2026
Vendor
ImageMagick Studio LLC
Product
ImageMagick
Classifications
CWE-401, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 25, 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 <7.1.2-27

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

ImageMagick Studio LLC · ImageMagickversion=0 <7.1.2-27

Published CVSS scores

3.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
3.3VulnCheckCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
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

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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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