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TI-2026-40724 Aliases CVE-2026-56361GHSA-4h5w-9gq6-38f8

ImageMagick - Heap Buffer Overflow via Off-by-One in Morphology Processing

Priority LOW 21CWE-125Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · None · Low
Fix status
Partial Red Hat: 2 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.

Summary

ImageMagick before 7.1.2-19 contains an off-by-one error in morphology validation allowing out-of-bounds heap buffer reads. Attackers can trigger heap buffer overflow by providing incorrect morphology parameters causing single pixel memory access violations.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00128 2nd percentileScored 2026-11-07
Fix Partial ImageMagick (ImageMagick): 7.1.2-19, 6.9.13-44Red Hat: 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ImageMagickImageMagick7.0.0 to before 7.1.2-197.1.2-19Patch availableCNA
ImageMagickImageMagickbefore 6.9.13-446.9.13-44Patch availableCNA
  • ImageMagick VendorImageMagick Affected 7.0.0 to before 7.1.2-19 Fixed in 7.1.2-19 Patch available CNA
  • ImageMagick VendorImageMagick Affected before 6.9.13-44 Fixed in 6.9.13-44 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:imagemagick:imagemagick:*:*:*:*:*:*:*:*before 6.9.13-44; 7.0.0-0 to before 7.1.2-19VulnerableImageMagick
  • cpe:2.3:a:imagemagick:imagemagick:*:*:*:*:*:*:*:* Versions before 6.9.13-44; 7.0.0-0 to before 7.1.2-19 Vulnerable ·ImageMagick

Remediation

  • Fix · CNA ImageMagick (ImageMagick) Fixed in 7.1.2-19
  • Fix · CNA ImageMagick (ImageMagick) Fixed in 6.9.13-44

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    ImageMagick 6.9.13-44, 7.1.2-19

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-40728 ImageMagick - Memory Leak in PNG Encoder via MNG Image WritingPriority LOW 28
    Show all 2 records →

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-56361
  2. 2026-10-03 Alias added: GHSA-4h5w-9gq6-38f8
  3. 2026-10-29 Affected versions changed · CNA

References

Advisory 1

  • TI-2016-03144 The (1) EPHEMERAL, (2) HTTPS, (3) MVG, (4) MSL, (5) TEXT, (6) SHOW, (7) WIN, and (8) PLT… KEVCVSS 3.1HIGH 8.4
  • TI-2023-16996 Improper input validation in ImageMagick CVSS 3.1CRITICAL 9.8
  • TI-2016-03148 The (1) HTTP and (2) FTP coders in ImageMagick before 6.9.3-10 and 7.x before 7.0.1-1… KEVCVSS 3.1MEDIUM 5.5
  • TI-2016-03145 The EPHEMERAL coder in ImageMagick before 6.9.3-10 and 7.x before 7.0.1-1 allows remote… KEVCVSS 3.1MEDIUM 5.5
  • TI-2025-35690 ImageMagick BlobStream Forward-Seek Under-Allocation CVSS 3.1CRITICAL 9.8
  • TI-2025-33094 ImageMagick has Stack Buffer Overflow in image.c CVSS 3.1CRITICAL 9.8
See all 888 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences