CVE-2026-56369Network attack vector

Pixel plaintext recovery via AES-CTR keystream reuse

Published Jun 30, 2026 · Updated Jun 30, 2026

Information disclosure in ImageMagick 6 before 6.9.13-47 and 7 before 7.1.2-22 allows remote attackers to recover encrypted pixel data. PasskeyEncipherImage derives the AES key and initial counter deterministically from the passphrase and image dimensions, causing equal-size images encrypted with one passphrase to reuse a CTR keystream. Exploitation requires access to such ciphertexts and reveals pixel plaintext without changing images or interrupting processing.

CVSS severity6.3
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in ImageMagick 6 before 6.9.13-47 and 7 before 7.1.2-22 allows remote attackers to recover encrypted pixel data. PasskeyEncipherImage derives the AES key and initial counter deterministically from the passphrase and image dimensions, causing equal-size images encrypted with one passphrase to reuse a CTR keystream. Exploitation requires access to such ciphertexts and reveals pixel plaintext without changing images or interrupting processing.

The record

CVE
CVE-2026-56369
Published
Jun 30, 2026
Updated
Jun 30, 2026
Vendor
ImageMagick Studio LLC
Product
ImageMagick
Classifications
CWE-330, CWE-323
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 30, 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 <6.9.13-47
  2. Affected versionversion=0 <7.1.2-22

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ImageMagick Studio LLC · ImageMagickversion=0 <6.9.13-47; version=0 <7.1.2-22

Published CVSS scores

6.3VulnCheckCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
3.7VulnCheckCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A: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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-330Use of Insufficiently Random Values
CWE-323Reusing a Nonce, Key Pair in Encryption

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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