CVE-2026-81930 Apache Software Foundation CVE debrief

Who should care

Defenders responsible for Apache Airflow and Snowflake configurations should assess exposure and verify the Snowflake connection configuration to ensure that the `account` and `region` fields are validated. This includes operators, platform administrators, vulnerability management teams, and security teams who need to review and update the Snowflake connection configuration to prevent exploitation.

Why it matters

The CVE-2026-81930 vulnerability in Apache Airflow's Snowflake provider allows an attacker to intercept and replay a valid token for the account. Defenders should prioritize verifying the Snowflake connection configuration and ensuring that the `account` and `region` fields are validated. This vulnerability requires attention from defenders responsible for Apache Airflow and Snowflake configurations.

• An attacker can cause a valid token for the account to be delivered to a host of their choosing and replay it against the genuine Snowflake endpoint.
• Defenders need to verify the Snowflake connection configuration to prevent exploitation.
• The vulnerability requires an attacker to have write-only access to the Snowflake connection, but no Dag-authoring ability is required.

Technical summary

The Apache Airflow Snowflake provider did not validate the connection's `account` and `region` fields before interpolating them into request URLs. This allows an attacker with write-only access to the Snowflake connection to cause a valid token for the account to be delivered to a host of their choosing and replay it against the genuine Snowflake endpoint. The vulnerability requires an attacker to have write-only access to the Snowflake connection, but no Dag-authoring ability is required. Defenders should prioritize verifying the Snowflake connection configuration and ensuring that the `account` and `region` fields are validated.

Defensive priority

Defenders should prioritize verifying the Snowflake connection configuration and ensuring that the `account` and `region` fields are validated.

Recommended defensive actions

• Verify the Snowflake connection configuration to ensure that the `account` and `region` fields are validated.
• Update the Apache Airflow Snowflake provider to version 6.18.0 or later.
• Monitor for suspicious activity related to the Snowflake connection.
• 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 item provide details on the vulnerability, including the affected package and versions. The Apache Airflow Snowflake provider did not validate the connection's `account` and `region` fields before interpolating them into request URLs, allowing an attacker with write-only access to the Snowflake connection to cause a valid token for the account to be delivered to a host of their choosing and replay it against the genuine Snowflake endpoint. Defenders should verify the Snowflake connection configuration to and

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.