CVE-2026-112407 AWS CVE debrief

Who should care

Defenders responsible for AWS CICD-toolchain-for-serverless-applications deployments, particularly those with push access to the application source repository, should assess exposure and prioritize remediation.

Why it matters

CVE-2026-112407 is a high-severity vulnerability that allows privilege escalation and access to resources outside the application stack. Defenders should prioritize remediation by upgrading to version 1.0.11 or later and restrict push access to the application source repository.

• Privilege escalation for remote authenticated users
• Access or modification of resources outside the application stack
• Potential for lateral movement within the same AWS account

Technical summary

The vulnerability is caused by incorrect privilege assignment in the IAM policy of AWS CICD-toolchain-for-serverless-applications versions 1.0.7 through 1.0.10. This allows remote authenticated users with push access to the application source repository to escalate privileges and access or modify resources outside the application stack in the same AWS account via application templates deployed by the toolchain pipeline.

Defensive priority

Defenders should prioritize upgrading existing toolchain stacks to version 1.0.11 or later to prevent privilege escalation.

Recommended defensive actions

• Upgrade existing toolchain stacks to version 1.0.11 or later
• Review and restrict push access to the application source repository
• Monitor for suspicious activity in the toolchain pipeline
• 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 details on the vulnerability, including its description, CVSS score, and affected versions. The vulnerability is caused by incorrect privilege assignment in the IAM policy of AWS CICD-toolchain-for-serverless-applications versions 1.0.7 through 1.0.10. This allows remote authenticated users with push access to the application source repository to escalate privileges and access or modify resources outside the application stack in the same AWS account via application templates deployed by the toolbox

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.