CVE-2026-111985 AUTOMATIC1111 CVE debrief

Who should care

Defenders responsible for AUTOMATIC1111 stable-diffusion-webui deployments should assess exposure and prioritize verification and potential patching. This includes operators, platform administrators, vulnerability management teams, and security teams who need to verify the affected version, review configurations, and consider applying patches or workarounds.

Why it matters

CVE-2026-111985 is a vulnerability in AUTOMATIC1111 stable-diffusion-webui that allows for remote resource allocation attacks. Defenders should prioritize verifying the affected version and assessing exposure.

• Remote attackers may be able to launch resource allocation attacks
• The exploit has been made public and could be used
• Defenders need to verify the affected version and assess exposure

Technical summary

The vulnerability is in the read_metadata_from_safetensors function of the modules/sd_models.py file in AUTOMATIC1111 stable-diffusion-webui up to 1.10.1. The manipulation of the argument header length field results in allocation of resources, allowing for remote attacks. This vulnerability allows remote attackers to launch resource allocation attacks. Defenders should prioritize verifying the affected version and assessing exposure, as the exploit has been made public and could be used. The project was informed of the problem early through an issue report but has not responded yet.

Defensive priority

Defenders should prioritize verifying the affected version and assessing exposure, as the vulnerability allows for remote attacks and has a publicly available exploit.

Recommended defensive actions

• Verify the version of AUTOMATIC1111 stable-diffusion-webui and assess exposure
• Review the configuration and implementation of the Metadata Extraction component
• Consider applying patches or workarounds if available
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The vulnerability was found in AUTOMATIC1111 stable-diffusion-webui up to 1.10.1, specifically in the read_metadata_from_safetensors function of the modules/sd_models.py file. The exploit has been made public, but the project has not responded yet.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.