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CVE-2026-70660— stable-diffusion.cpp: Out-of-bounds read in safetensors loader: unvalidated data_offsets allow a tensor's byte range to extend past the end of the file

Quick assessment

Affected
leejet stable-diffusion.cpp
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.

stable-diffusion.cpp 是一个纯 C/C++ 库，用于执行扩散模型（包括 Stable Diffusion、Flux、Wan、Qwen Image、Z-Image 等）的推理任务。在 master-764-e22272e 版本之前，src/model_io/safetensors_io.cpp 中的 safetensors 加载器在仅验证 nbytes 是否等于 end - begin 后，便信任每个张量的 data_offsets 字段。攻击者可构造一个特制的 .safetensors 文件，声

CVSS 6.9 · Medium
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I. Basic Information for CVE-2026-70660

Vulnerability Information
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Vulnerability Title
stable-diffusion.cpp: Out-of-bounds read in safetensors loader: unvalidated data_offsets allow a tensor's byte range to extend past the end of the file
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. Prior to master-764-e22272e, the safetensors loader in src/model_io/safetensors_io.cpp trusts each tensor's data_offsets after checking only that nbytes equals end - begin. A crafted .safetensors file can declare a byte range beyond the file's data section, causing src/model_loader.cpp to consume an attacker-chosen length from an unchecked mapped-file offset. Loading the model can read adjacent process memory into tensor buffers or crash the process. This issue is fixed in master-764-e22272e.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
leejet stable-diffusion.cpp < master-764-e22272e -

II. Public POCs for CVE-2026-70660

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III. Intelligence Information for CVE-2026-70660

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Other References for CVE-2026-70660 (4)

IV. Related Vulnerabilities

Same product: stable-diffusion.cpp
Same vendor: leejet
Same weakness: CWE-125