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CVE-2026-40183— ImageMagick: Heap buffer overflow when encoding JXL image with a 16-bit float

Quick assessment

Affected
ImageMagick ImageMagick
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ImageMagick是ImageMagick开源的一套开源的图像处理软件。可读取、转换或写入多种格式的图片。 ImageMagick 7.1.2-19之前版本存在安全漏洞，该漏洞源于JXL编码器存在堆写入溢出，可能导致崩溃。

CVSS 5.5 · Medium EPSS 0.20% · P9

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2026-40183

Vulnerability Information
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Vulnerability Title
ImageMagick: Heap buffer overflow when encoding JXL image with a 16-bit float
Source: CVE Program / CVE List V5
Vulnerability Description
ImageMagick is free and open-source software used for editing and manipulating digital images. In versions below 7.1.2-19, the JXL encoder has an heap write overflow when a user specifies that the image should be encoded as 16 bit floats. This issue has been fixed in version 7.1.2-19.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
ImageMagick 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ImageMagick是ImageMagick开源的一套开源的图像处理软件。可读取、转换或写入多种格式的图片。 ImageMagick 7.1.2-19之前版本存在安全漏洞，该漏洞源于JXL编码器存在堆写入溢出，可能导致崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ImageMagick ImageMagick < 7.1.2-19 -

II. Public POCs for CVE-2026-40183

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III. Intelligence Information for CVE-2026-40183

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Vendor Pages for CVE-2026-40183 (2)

Same Patch Batch · ImageMagick · 2026-04-13 · 12 CVEs total

CVE-2026-33901 7.5 HIGH ImageMagick has a Heap Buffer Overflow via MVG decoder
CVE-2026-33908 7.5 HIGH ImageMagick is vulnerable to Stack Overflow in DestroyXMLTree()
CVE-2026-40312 6.2 MEDIUM ImageMagick: Off-by-One in MSL decoder could result in crash
CVE-2026-40169 6.2 MEDIUM ImageMagick: Heap buffer overflow (WRITE) in the YAML and JSON encoders
CVE-2026-33900 5.9 MEDIUM ImageMagick has a Heap overflow caused by integer overflow/wraparound in viff encoder on 3
CVE-2026-40311 5.5 MEDIUM ImageMagick: Heap-use-after-free via XMP profile could result in a crash when printing val
CVE-2026-40310 5.5 MEDIUM ImageMagick: Heap out-of-bounds write in JP2 encoder
CVE-2026-33902 5.5 MEDIUM ImageMagick: Stack Overflow via Recursive FX Expression Parsing
CVE-2026-33905 5.5 MEDIUM ImageMagick has an Out-of-Bounds read via -sample operation
CVE-2026-33899 5.3 MEDIUM ImageMagick: Heap BufferOverflow write of single zero byte when parsing XML
CVE-2026-34238 5.1 MEDIUM ImageMagick: Integer overflow in despeckle operation causes heap buffer overflow on 32-bit

IV. Related Vulnerabilities

Same product: ImageMagick
Same vendor: ImageMagick
Same weakness: CWE-122