CVE-2026-47749Public exploit

Process crash via signed SHORT_BINUNICODE length

Published Jun 16, 2026 · Updated Jun 16, 2026

Heap buffer overflow in stable-diffusion.cpp before master-584-0a7ae07 allows attackers to crash applications via a crafted .ckpt file. The SHORT_BINUNICODE handler in src/model.cpp reads the one-byte length as signed int8_t; 0xFF becomes -1, passes the upper-bound check, and reaches memcpy as SIZE_MAX. Exploitation requires an affected application or user to load an untrusted checkpoint, producing immediate heap corruption and a process crash; code execution is not established.

CVSS severity7.8
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in stable-diffusion.cpp before master-584-0a7ae07 allows attackers to crash applications via a crafted .ckpt file. The SHORT_BINUNICODE handler in src/model.cpp reads the one-byte length as signed int8_t; 0xFF becomes -1, passes the upper-bound check, and reaches memcpy as SIZE_MAX. Exploitation requires an affected application or user to load an untrusted checkpoint, producing immediate heap corruption and a process crash; code execution is not established.

The record

CVE
CVE-2026-47749
Published
Jun 16, 2026
Updated
Jun 16, 2026
Vendor
leejet
Product
stable-diffusion.cpp
Classifications
CWE-787, CWE-122, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< master-584-0a7ae07

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

leejet · stable-diffusion.cppversion=< master-584-0a7ae07

Published CVSS scores

7.8GitHub, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-122Heap-based Buffer Overflow
T1204.002Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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