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CVE-2026-47747— stable-diffusion.cpp has a Heap-based Buffer Overflow

CVSS 7.8 · High EPSS 0.14% · P4

Affected Version Matrix 1

VendorProductVersion RangeStatus
leejetstable-diffusion.cpp< master-584-0a7ae07affected
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I. Basic Information for CVE-2026-47747

Vulnerability Information
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Vulnerability Title
stable-diffusion.cpp has a Heap-based Buffer Overflow
Source: NVD (National Vulnerability Database)
Vulnerability Description
stable-diffusion.cpp is a pure C/C++ library for running diffusion model (Stable Diffusion, Flux, Wan, Qwen Image, Z-Image, and more) inference. In versions prior to master-584-0a7ae07, the pickle .ckpt parser in src/model.cpp contained a heap buffer overflow vulnerability in the BINUNICODE opcode handler. The issue was caused by sign confusion on the opcode length field. A crafted .ckpt file could trigger memcpy with a very large length derived from a negative signed value, causing immediate heap corruption. The issue has been resolved in version master-584-0a7ae07. If developers are unable to immediately update their applications they can work around this issue by only loading .ckpt checkpoint files from trusted sources and preferring trusted model sources and safer formats such as .safetensors where possible.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
堆缓冲区溢出
Source: NVD (National Vulnerability Database)
Vulnerability Title
leejet stable-diffusion.cpp 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
stable-diffusion.cpp是leejet个人开发者的一种基于C++的纯推理扩散模型实现。 leejet stable-diffusion.cpp存在缓冲区错误漏洞，该漏洞源于src/model.cpp中pickle .ckpt解析器的BINUNICODE操作码处理程序存在堆缓冲区溢出，由操作码长度字段的符号混乱导致，特制.ckpt文件可能触发memcpy使用负值推导出的超大长度，导致堆破坏。
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

VendorProductAffected VersionsCPESubscribe
leejetstable-diffusion.cpp < master-584-0a7ae07 -

II. Public POCs for CVE-2026-47747

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III. Intelligence Information for CVE-2026-47747

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Patches & Fixes for CVE-2026-47747 (1)

Vendor Advisories for CVE-2026-47747 (1)

Same Patch Batch · leejet · 2026-06-16 · 4 CVEs total

CVE-2026-477497.8 HIGHstable-diffusion.cpp: Heap buffer overflow in SHORT_BINUNICODE parsing for PyTorch checkpo
CVE-2026-477507.8 HIGHstable-diffusion.cpp: Heap buffer overflow in GLOBAL opcode parsing for PyTorch checkpoint
CVE-2026-477485.5 MEDIUMstable-diffusion.cpp: Out-of-bounds reads in PyTorch checkpoint pickle opcode parsing

IV. Related Vulnerabilities

Same product: stable-diffusion.cpp
Same vendor: leejet
Same weakness: CWE-122

V. Comments for CVE-2026-47747

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