CVE-2026-47747
stable-diffusion.cpp has a Heap-based Buffer Overflow
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.
INFO
Published Date :
June 16, 2026, 8:16 p.m.
Last Modified :
June 25, 2026, 1:55 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE |
Solution
- Update stable-diffusion.cpp library to master-584-0a7ae07.
- Load .ckpt files only from trusted sources.
- Prefer .safetensors format for models.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-47747.
| URL | Resource |
|---|---|
| https://github.com/leejet/stable-diffusion.cpp/commit/0a7ae07f948eff4611968a65a22bd7c7031ad74f | Patch |
| https://github.com/leejet/stable-diffusion.cpp/pull/1443 | Issue Tracking Patch |
| https://github.com/leejet/stable-diffusion.cpp/security/advisories/GHSA-mghm-5mqc-pwmp | Exploit Mitigation Vendor Advisory |
| https://github.com/leejet/stable-diffusion.cpp/security/advisories/GHSA-mghm-5mqc-pwmp | Exploit Mitigation Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-47747 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-47747
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-47747 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-47747 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jun. 25, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:leejet:stable-diffusion.cpp:*:*:*:*:*:c++:*:* versions up to (excluding) master-584-0a7ae07 Added Reference Type GitHub, Inc.: https://github.com/leejet/stable-diffusion.cpp/commit/0a7ae07f948eff4611968a65a22bd7c7031ad74f Types: Patch Added Reference Type GitHub, Inc.: https://github.com/leejet/stable-diffusion.cpp/pull/1443 Types: Issue Tracking, Patch Added Reference Type GitHub, Inc.: https://github.com/leejet/stable-diffusion.cpp/security/advisories/GHSA-mghm-5mqc-pwmp Types: Exploit, Mitigation, Vendor Advisory Added Reference Type CISA-ADP: https://github.com/leejet/stable-diffusion.cpp/security/advisories/GHSA-mghm-5mqc-pwmp Types: Exploit, Mitigation, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added Reference https://github.com/leejet/stable-diffusion.cpp/security/advisories/GHSA-mghm-5mqc-pwmp Added SSVC {'id': 'CVE-2026-47747', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-17T18:11:20.505716Z'} -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'leejet', 'product': 'stable-diffusion.cpp', 'versions': [{'status': 'affected', 'version': '< master-584-0a7ae07'}]}] -
New CVE Received by [email protected]
Jun. 16, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Added CWE CWE-787 Added CWE CWE-122 Added Reference https://github.com/leejet/stable-diffusion.cpp/commit/0a7ae07f948eff4611968a65a22bd7c7031ad74f Added Reference https://github.com/leejet/stable-diffusion.cpp/pull/1443 Added Reference https://github.com/leejet/stable-diffusion.cpp/security/advisories/GHSA-mghm-5mqc-pwmp