CVE-2026-28691— ImageMagick has an uninitialized pointer dereference in JBIG 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 7.1.2-16之前版本和6.9.13-41之前版本存在缓冲区错误漏洞，该漏洞源于JBIG解码器存在未初始化指针取消引用，可能导致缺少检查。
Possible ATT&CK Techniques 2 AI
T1200 · Hardware Additions T1059 · Command and Scripting InterpreterAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| ImageMagick | ImageMagick | >= 7.0.0, < 7.1.2-16 |
affected |
< 6.9.13-41 |
affected |
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I. Basic Information for CVE-2026-28691
Vulnerability Information
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Vulnerability Title
ImageMagick has an uninitialized pointer dereference in JBIG decoder
Source: CVE Program / CVE List V5
Vulnerability Description
ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2-16 and 6.9.13-41, an uninitialized pointer dereference vulnerability exists in the JBIG decoder due to a missing check. This vulnerability is fixed in 7.1.2-16 and 6.9.13-41.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加检查的返回值
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 7.1.2-16之前版本和6.9.13-41之前版本存在缓冲区错误漏洞，该漏洞源于JBIG解码器存在未初始化指针取消引用，可能导致缺少检查。
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 | >= 7.0.0, < 7.1.2-16 | - |
|
II. Public POCs for CVE-2026-28691
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-28691 (1)
Same Patch Batch · ImageMagick · 2026-03-09 · 16 CVEs total
| CVE-2026-28693 | 8.1 HIGH | ImageMagick has an integer overflow in DIB coder can result in out of bounds read or write |
| CVE-2026-30929 | 7.7 HIGH | ImageMagick has a stack buffer overflow in MagnifyImage |
| CVE-2026-28494 | 7.1 HIGH | ImageMagick affected by stack corruption through long morphology kernel names or arrays |
| CVE-2026-28690 | 6.9 MEDIUM | ImageMagick has a stack write buffer overflow in MNG encoder |
| CVE-2026-28686 | 6.8 MEDIUM | ImageMagick has a write heap-buffer-overflow in PCL encoder via undersized output buffer |
| CVE-2026-30931 | 6.8 MEDIUM | ImageMagick has a heap-based buffer overflow in UHDR encoder |
| CVE-2026-30937 | 6.8 MEDIUM | ImageMagick has a heap buffer overflow in WriteXWDImage due to CARD32 arithmetic overflow |
| CVE-2026-28493 | 6.5 MEDIUM | ImageMagick has a Integer Overflow leading to out of bounds write in SIXEL decoder |
| CVE-2026-28689 | 6.3 MEDIUM | ImageMagick has a Path Policy TOCTOU symlink race bypass |
| CVE-2026-30883 | 5.7 MEDIUM | ImageMagick has a Heap Overflow when writing extremely large image profile in the PNG enco |
| CVE-2026-30936 | 5.5 MEDIUM | ImageMagick has a heap Buffer Overflow in WaveletDenoiseImage |
| CVE-2026-28687 | 5.3 MEDIUM | ImageMagick has a Heap Use-After-Free in ImageMagick MSL decoder |
| CVE-2026-28692 | 4.8 MEDIUM | ImageMagick has a heap buffer over-read via 32-bit integer overflow in MAT decoder |
| CVE-2026-30935 | 4.4 MEDIUM | ImageMagick has a heap Buffer Over-Read in BilateralBlurImage |
| CVE-2026-28688 | 4.0 MEDIUM | ImageMagick has a heap use-after-free in the MSL encoder |
IV. Related Vulnerabilities
Same product: ImageMagick
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CVE-2026-105083
ImageMagick before 7.1.2-32 and 6.9.13-57 Security Policy By -
CVE-2026-102635
ImageMagick before 7.1.2-32 and 6.9.13-57 Uninitialized Heap -
CVE-2026-93590
ImageMagick before 7.1.2-31 Policy Bypass in UHDR encoder -
CVE-2026-93589
ImageMagick before 7.1.2-31 Division by Zero in FLIF encoder -
CVE-2026-93588
ImageMagick before 7.1.2-31 Null Pointer Dereference via PNM
Same vendor: ImageMagick
-
CVE-2026-105083
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CVE-2026-102635
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CVE-2026-93590
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CVE-2026-93588
ImageMagick before 7.1.2-31 Null Pointer Dereference via PNM -
CVE-2026-93589
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Same weakness: CWE-252
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V. Comments for CVE-2026-28691
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