CVE-2026-35561 Insufficient authentication security controls in browser-based authentication components in Amazon Athena ODBC driver

Critical 9.1 Published 3 Apr 2026 Updated 20 Oct 2026

Attackers can intercept or hijack authentication sessions in the Amazon Athena ODBC driver due to insufficient browser-based authentication controls.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-35561?

CVE-2026-35561 is a critical authentication bypass vulnerability in Amazon Athena ODBC driver, published on 3 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Insufficient authentication security controls in the browser-based authentication components in Amazon Athena ODBC driver before 2.1.0.0 might allow a threat actor to intercept or hijack authentication sessions due to insufficient protections in the browser-based authentication flows.

To remediate this issue, users should upgrade to version 2.1.0.0.

Weakness: CWE-862

Which versions are affected by CVE-2026-35561?

It affects 1 product.

Products include Amazon Athena Odbc.

How do I fix CVE-2026-35561?

No fix has been published for CVE-2026-35561 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-35561 being exploited?

There is no known exploitation of CVE-2026-35561 in the wild and no public exploit code.

Sources

Also known as GHSA-f5vm-7v68-f9ff.