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CVE-2026-56378— ImageMagick - Heap Out-of-Bounds Read in PCD Decoder

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团队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 7.1.2-15之前版本和6.x 6.9.13-40之前版本存在缓冲区错误漏洞，该漏洞源于PCD编码器的DecodeImage循环中存在堆越界读取，可能导致拒绝服务和相邻堆字节泄露。

CVSS 3.7 · Low EPSS 0.39% · P33

Possible ATT&CK Techniques 1 AI

T1210 · Exploitation of Remote Services

Affected Version Matrix 4

VendorProduct Version RangeStatus
ImageMagick ImageMagick < 7.1.2-15 affected
7.1.2-15 unaffected
< 6.9.13-40 affected
6.9.13-40 unaffected
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I. Basic Information for CVE-2026-56378

Vulnerability Information
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Vulnerability Title
ImageMagick - Heap Out-of-Bounds Read in PCD Decoder
Source: CVE Program / CVE List V5
Vulnerability Description
ImageMagick before 7.1.2-15 (and 6.x before 6.9.13-40) contains a heap out-of-bounds read in the PCD coder's DecodeImage loop. A crafted PCD file can trigger a one-byte heap out-of-bounds read during image decoding, resulting in denial of service and potential disclosure of an adjacent heap byte.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
ImageMagick 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ImageMagick是ImageMagick团队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 7.1.2-15之前版本和6.x 6.9.13-40之前版本存在缓冲区错误漏洞，该漏洞源于PCD编码器的DecodeImage循环中存在堆越界读取，可能导致拒绝服务和相邻堆字节泄露。
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 0 ~ 7.1.2-15 -
ImageMagick ImageMagick 0 ~ 6.9.13-40 -

II. Public POCs for CVE-2026-56378

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III. Intelligence Information for CVE-2026-56378

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Vendor Advisories for CVE-2026-56378 (2)

IV. Related Vulnerabilities

Same product: ImageMagick
Same vendor: ImageMagick
Same weakness: CWE-125