Metadata Extraction Flaw in AUTOMATIC1111 Stable-Diffusion-WebUI
CVE-2026-111985

5.3MEDIUM

Key Information:

Vendor

Automatic1111

Status
Stable-diffusion-webui
Vendor
CVE Published:
18 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-111985?

A vulnerability exists in the AUTOMATIC1111 Stable-Diffusion-WebUI, affecting versions up to 1.10.1, specifically in the read_metadata_from_safetensors function located in the modules/sd_models.py file. This vulnerability allows remote attackers to manipulate the header length field, resulting in unbounded resource allocation. Although the project team was notified of the issue via an issue report, there has been no response. The exploit has been publicly disclosed, posing a potential risk for users of the affected software.

Affected Version(s)

stable-diffusion-webui 1.10.0

stable-diffusion-webui 1.10.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-111985 - Proof of Concept

References

https://vuldb.com/vuln/421651
vdb-entrytechnical-description
https://vuldb.com/vuln/421651/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-111985
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

r1ck99 (VulDB User)
VulDB CNA Team
.