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CVE-2026-47747

Leejet Stable-diffusion.cpp buffer overflow

7.8 HIGHPublic exploitEPSS 0.20%
  1. Published16 Jun 2026

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.

CVSS 3.1 breakdown

Attack vectorLocal
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Leejet Stable-diffusion.cpp< master-584-0a7ae07

Remediation

Fixed in
Leejet Stable-diffusion.cpp≥ master-584-0a7ae07

References

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Frequently asked

Is CVE-2026-47747 being actively exploited?

CVE-2026-47747 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.20%.

How severe is CVE-2026-47747?

CVE-2026-47747 has a CVSS 3.1 base score of 7.8, rated high. EPSS estimates a 0.20% probability of exploitation.

Which products are affected by CVE-2026-47747?

Affected products include Leejet Stable-diffusion.cpp.

How do I fix CVE-2026-47747?

Upgrade affected software to a fixed version, for example Leejet Stable-diffusion.cpp master-584-0a7ae07 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-47747 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.