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CVE-2026-47750— stable-diffusion.cpp: Heap buffer overflow in GLOBAL opcode parsing for PyTorch checkpoint files

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解析器在处理GLOBAL操作码时存在堆缓冲区溢出，由搜索换行符分隔字段时缺少验证导致，攻击者通过特制.ckpt文件可能造成堆损坏。

CVSS 7.8 · High EPSS 0.18% · P8 Updated Jun 17, 2026

Possible ATT&CK Techniques 1 AI

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-2026-47750

Vulnerability Information

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Vulnerability Title

stable-diffusion.cpp: Heap buffer overflow in GLOBAL opcode parsing for PyTorch checkpoint files

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 GLOBAL opcode handler. The issue was caused by missing validation when searching for newline-delimited fields. A crafted .ckpt file without the expected newline could cause the parser to use -1 as a copy length, resulting in immediate heap corruption. The attack requires the victim or application to load a .ckpt file from an untrusted source, such as a downloaded model from a model sharing site. 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 following these instructions: do not load .ckpt checkpoint files from untrusted sources, and prefer 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

跨界内存写

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-2026-47750

#	POC Description	Source Link	Shenlong Link

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Qwen3.6-35B-A3B · 11028 chars

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III. Intelligence Information for CVE-2026-47750

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Patches & Fixes for CVE-2026-47750 (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-2026-47750 (1)

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

https://www.cve.org/CVERecord?id=CVE-2026-47750

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-2026-47747	7.8 HIGH	stable-diffusion.cpp has a Heap-based Buffer Overflow
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-787