CVE-2026-58139 duckdb CVE debrief

Who should care

Defenders responsible for managing and securing DuckDB instances with the AWS extension should assess exposure and take action to restrict access to sensitive AWS credentials. This includes verifying the presence of the vulnerable extension, restricting access to sensitive AWS credentials, and monitoring for suspicious activity related to AWS credential extraction. Additionally, defenders should prioritize verifying the presence of the vulnerable extension

Why it matters

The CVE-2026-58139 vulnerability in the DuckDB AWS extension allows users with SQL execution permissions to extract plaintext AWS credentials, which can be used to access AWS APIs. Defenders should prioritize verifying the presence of the vulnerable extension and restricting access to sensitive AWS credentials.

• Defenders need to verify the presence of the vulnerable DuckDB AWS extension and restrict access to sensitive AWS credentials to prevent unauthorized extraction.
• The vulnerability allows users with SQL execution permissions to extract plaintext AWS credentials, which can be used to access AWS APIs.
• Defenders should prioritize verifying the presence of the vulnerable extension and restricting access to sensitive AWS credentials to prevent potential security breaches.

Technical summary

The DuckDB AWS extension for DuckDB contains a security policy bypass vulnerability that allows any database user with SQL execution permissions to extract plaintext AWS credentials by calling the load_aws_credentials function with the redact_secret parameter set to false, circumventing the database-wide allow_unredacted_secrets=false policy. Attackers can invoke this single function to retrieve the underlying AWS credential chain including access_key_id, secret_access_key, session_token, and region in plaintext, which are immediately valid against AWS APIs and particularly impactful in managed environments where pg_duckdb is preloaded and an AWS credential chain such as IMDSv2, IRSA, ECS task role, or EC2 inst

Defensive priority

Defenders should prioritize verifying the presence of the vulnerable DuckDB AWS extension and restricting access to sensitive AWS credentials.

Recommended defensive actions

• Verify the presence of the vulnerable DuckDB AWS extension in your environment
• Restrict access to sensitive AWS credentials
• Monitor for suspicious activity related to AWS credential extraction
• 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 source references indicate a security policy bypass vulnerability in the DuckDB AWS extension. The vulnerability allows users with SQL execution permissions to extract plaintext AWS credentials.

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.