CVE-2026-56374

Service interruption via unchecked FTXT format boundary

Published Jul 8, 2026 · Updated Jul 8, 2026

Out-of-bounds read in the FTXT encoder in ImageMagick before 7.1.2-19 allows attackers to interrupt processing via crafted FTXT files. The encoder parses the ftxt:format value without checking its boundary, causing a one-byte heap read beyond the allocated buffer. Exploitation requires a local or user-induced ImageMagick invocation; the upstream assessment limits the consequence to reduced availability.

CVSS severity4.8
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in the FTXT encoder in ImageMagick before 7.1.2-19 allows attackers to interrupt processing via crafted FTXT files. The encoder parses the ftxt:format value without checking its boundary, causing a one-byte heap read beyond the allocated buffer. Exploitation requires a local or user-induced ImageMagick invocation; the upstream assessment limits the consequence to reduced availability.

The record

CVE
CVE-2026-56374
Published
Jul 8, 2026
Updated
Jul 8, 2026
Vendor
ImageMagick Studio LLC
Product
ImageMagick
Classifications
CWE-125, CAPEC-540, T1204.002
Attack vector
local
Privileges
unauthenticated

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 <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

3.3VulnCheckCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
7.1NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
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.

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-125Out-of-bounds Read
CAPEC-540Overread Buffers
T1204.002Malicious File

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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