RCE in Automatic1111 Stable-Diffusion-Webui
CVE-2026-111987
A vulnerability was identified in AUTOMATIC1111 stable-diffusion-webui up to 1.10.1. Affected by this vulnerability is the function read_metadata_from_safetensors of the file modules/sd_models.py of the component Extra-Networks Card Builder. Such manipulation of the argument __metadata__.sshs_model_hash leads to cross site scripting. The attack can be launched remotely. The exploit is publicly available and might be used. The project was informed of the problem early through an issue report but has not responded yet.
Vulnerability class: XSS (Cross-Site Scripting)
Published .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Automatic1111 Stable-Diffusion-Webui — versions 1.10.0, 1.10.1
Weakness classification (CWE)
References
- vuldb.com/vuln/421653 (technical-description, vdb-entry)
- vuldb.com/vuln/421653/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-111987 (third-party-advisory)
- vuldb.com/submit/1006710 (third-party-advisory)
- github.com/AUTOMATIC1111/stable-diffusion-webui/issues/17500 (issue-tracking)
- github.com/user-attachments/files/32834382/a1111-sshs-hash-poc.zip (exploit)
- github.com/AUTOMATIC1111/stable-diffusion-webui/ (product)
Frequently asked questions
- What is CVE-2026-111987?
- CVE-2026-111987 is a medium-severity vulnerability in Automatic1111 Stable-Diffusion-Webui, classified under Cross-site Scripting. CVSS score: 4.3/10. Published 2026-10-18.
- How severe is CVE-2026-111987?
- Medium severity. CVSS v3 base score is 4.3 out of 10.