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

Quick assessment

Affected

leejet stable-diffusion.cpp

Exploitation

Public or AI PoC available; prioritize validation

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

CVSS 7.8 · High EPSS 0.18% · P8 Updated Jun 18, 2026

Possible ATT&CK Techniques 2 AI

T1190 · Exploit Public-Facing Application T1203 · Exploitation for Client Execution

Affected Version Matrix 1

Vendor	Product	Version Range	Status
leejet	stable-diffusion.cpp	`< master-584-0a7ae07`	affected

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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: CVE Program / CVE List V5

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: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

堆缓冲区溢出

Source: CVE Program / CVE List V5

Vulnerability Title

leejet stable-diffusion.cpp 缓冲区错误漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

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
leejet	stable-diffusion.cpp	< master-584-0a7ae07	-

II. Public POCs for CVE-2026-47747

#	POC Description	Source Link	Shenlong Link

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Qwen3.6-35B-A3B · 10731 chars

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III. Intelligence Information for CVE-2026-47747

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

🔗 feat: add restricted torch legacy checkpoint loading by leejet · Pull Request #1443 · leejet/stable-diffusion.cpp · GitHub Read full article x_refsource_MISC

Vendor Advisories for CVE-2026-47747 (1)

🔗 Heap buffer overflow in BINUNICODE parsing for PyTorch checkpoint files · Advisory · leejet/stable-diffusion.cpp · GitHub Read full article x_refsource_CONFIRM

https://www.cve.org/CVERecord?id=CVE-2026-47747

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

CVE-2026-47749	7.8 HIGH	stable-diffusion.cpp: Heap buffer overflow in SHORT_BINUNICODE parsing for PyTorch checkpo
CVE-2026-47750	7.8 HIGH	stable-diffusion.cpp: Heap buffer overflow in GLOBAL opcode parsing for PyTorch checkpoint
CVE-2026-47748	5.5 MEDIUM	stable-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