Cross Site Scripting Vulnerability in AUTOMATIC1111 stable-diffusion-webui
CVE-2026-111987

5.3MEDIUM

Key Information:

Vendor

Automatic1111

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

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-111987?

A Cross Site Scripting vulnerability has been identified in the Extra-Networks Card Builder component of AUTOMATIC1111's stable-diffusion-webui, specifically in the read_metadata_from_safetensors function within modules/sd_models.py. This flaw allows attackers to manipulate the metadata.sshs_model_hash argument, potentially leading to harmful exploits that can be executed remotely. The exploit is publicly available, and while the project has been alerted to this issue through an official report, a response or patch has not yet been provided.

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-2026-111987 - Proof of Concept

References

https://vuldb.com/vuln/421653
vdb-entrytechnical-description
https://vuldb.com/vuln/421653/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-111987
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
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
.