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CVE-2026-53466 is an integer overflow vulnerability discovered in the XCF decoder component of ImageMagick, a widely-used open-source image processing library. The flaw resides in versions prior to 6.9.13-51 and 7.1.2-26, and it can be triggered when the library processes a specially crafted XCF image file.
At its core, the vulnerability stems from an integer overflow or wraparound during a calculation that the decoder performs while parsing an XCF image. When the logic assumes that an incremented integer value will always be larger than its original value, but the increment pushes the value beyond the maximum storable limit for its representation, the value wraps around to a very small or negative number. This is a classic instance of CWE-190: Integer Overflow or Wraparound.
The overflow typically occurs when calculating buffer sizes or image dimensions from data embedded in the XCF file. Because the resulting wrapped value is unexpectedly small, the decoder subsequently allocates a buffer that is insufficient for the actual data it intends to read. When the decoder then attempts to read image data into this undersized buffer, it performs an out-of-bounds read, accessing memory outside the allocated region.
This out-of-bounds read can cause the application to crash, leading to a denial-of-service condition. The attack vector is network-based, requiring no authentication and no user interaction, making it remotely exploitable. An attacker can simply supply a malicious XCF image to any service or application that uses a vulnerable ImageMagick instance for processing.
The vulnerability is also associated with CWE-681: Incorrect Conversion between Numeric Types, as the issue may involve converting a value from a larger data type (such as a long) to a smaller one (such as an integer), causing data to be truncated or translated in unexpected ways. If these unexpected values are then used in a sensitive context—like memory allocation or pointer arithmetic—dangerous behaviors, including out-of-bounds reads, can manifest.
The CVSS v3.1 base score for this vulnerability is 6.5, with a severity rating of MEDIUM. The attack complexity is low, the attack vector is network-based, and it requires no privileges or user interaction. The confidentiality and availability impacts are low, while integrity impact is none.
DailyCVE Form:
Platform: ImageMagick
Version: <6.9.13-51,<7.1.2-26
Vulnerability : Integer Overflow
Severity: MEDIUM (6.5)
date: 2026-07-01
Prediction: 2026-07-01 (Fixed)
What Undercode Say:
Analytics:
- EPSS: 0.22% (probability 0.12479)
- SSVC Exploitation: none
- SSVC Automatable: yes
- SSVC Technical Impact: partial
- CISA ADP Vulnrichment: coordinated
- Remote Exploitation: unauthenticated
- Attack Vector: NETWORK
- User Interaction: NONE
- Attack Complexity: LOW
- Privileges Required: NONE
Bash Commands:
Check current ImageMagick version
identify -version
Check if vulnerable (Debian/Ubuntu)
apt-cache policy imagemagick
Check if vulnerable (RHEL/CentOS/Fedora)
rpm -q ImageMagick
Upgrade to fixed version (6.9.13-51 or 7.1.2-26)
On Debian/Ubuntu
sudo apt-get update
sudo apt-get install imagemagick
On RHEL/CentOS/Fedora
sudo dnf upgrade ImageMagick
Verify upgrade
identify -version | head -n 1
Disable XCF decoder via policy.xml (workaround)
<
h2 style=”color: blue;”>sudo sed -i ‘/<policy domain=”coder” rights=”read” pattern=”XCF”/d’ /etc/ImageMagick-/policy.xml
sudo sed -i ‘/<policy domain=”coder” rights=”read” pattern=”XCF”/d’ /etc/ImageMagick/policy.xml
Exploit:
An attacker crafts a malicious XCF image with manipulated dimension or buffer size fields that cause an integer overflow during calculation. When the vulnerable ImageMagick decoder processes this file, the overflow leads to an out-of-bounds read. The exploit requires no authentication and no user interaction; the attacker only needs to deliver the crafted image to a target service that uses ImageMagick. No active exploitation has been reported in the wild.
Protection:
– Upgrade ImageMagick to version 6.9.13-51 or later, or 7.1.2-26 or later.
– If XCF support is not required, disable the XCF decoder via the ImageMagick security policy (policy.xml) by restricting or removing the XCF coder.
– Implement strict input validation to reject XCF files from untrusted sources.
– Deploy network-level monitoring to detect and block malicious image files.
Impact:
– Denial of Service (DoS): Application crashes or system instability.
– Remote Exploitation: Attackers can remotely send malicious images to vulnerable servers.
– Limited Confidentiality Impact: Out-of-bounds read may leak memory contents.
– No Integrity Impact: The vulnerability does not directly allow data modification.
– No active exploitation reported; priority for patching is low (23/100).
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Sources:
Reported By: github.com
Extra Source Hub:
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