CVE-2026-111987 AUTOMATIC1111 CVE debrief

Who should care

Defenders responsible for AUTOMATIC1111 stable-diffusion-webui deployments should assess exposure and prioritize verification of inventory and potential impact. Defenders should verify the presence of this vulnerability in their inventory and assess the potential impact on their systems. Defenders should consider applying patches or mitigations if available.

Why it matters

CVE-2026-111987 is a cross-site scripting vulnerability in AUTOMATIC1111 stable-diffusion-webui up to 1.10.1. Defenders should prioritize verifying the presence of this vulnerability in their inventory and assessing the potential impact on their systems.

• Defenders should verify the presence of this vulnerability in their inventory
• Defenders should assess the potential impact on their systems
• Defenders should consider applying patches or mitigations if available

Technical summary

The vulnerability is located in the read_metadata_from_safetensors function of the modules/sd_models.py file in the Extra-Networks Card Builder component of AUTOMATIC1111 stable-diffusion-webui up to 1.10.1. The vulnerability allows for cross-site scripting via the __metadata__.sshs_model_hash argument. Defenders should prioritize verifying the presence of this vulnerability in their inventory and assessing the potential impact on their systems. The attack can be launched remotely and the exploit is publicly available.

Defensive priority

Defenders should prioritize verifying the presence of this vulnerability in their inventory and assessing the potential impact on their systems.

Recommended defensive actions

• Verify the presence of this vulnerability in your inventory
• Assess the potential impact on your systems
• Consider applying patches or mitigations 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 CVE record and NVD entry provide limited information about the vulnerability. The exploit is publicly available, but there is no information on its usage or impact. Defenders should verify the presence of this vulnerability in their inventory and assess the potential impact on their systems. The vulnerability is located in the read_metadata_from_safetensors function of the modules/sd_models.py file in the Extra-Networks Card Builder component of AUTOMATIC1111 stable-diffusion-webui up to 1.10.1.

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.