CVE-2026-35560 Improper certificate validation in identity provider connection components in Amazon Athena ODBC driver

Critical 9.1 Published 3 Apr 2026 Updated 20 Oct 2026

Man-in-the-middle attackers can intercept authentication credentials when connecting to external identity providers due to improper certificate validation.

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-2026-35560?

CVE-2026-35560 is a critical 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

Improper certificate validation in the identity provider connection components in Amazon Athena ODBC driver before 2.1.0.0 might allow a man-in-the-middle threat actor to intercept authentication credentials due to insufficient default transport security when connecting to identity providers. This only applies to connections with external identity providers and does not apply to connections with Athena.

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

Weakness: CWE-295

Which versions are affected by CVE-2026-35560?

It affects 1 product.

Products include Amazon Athena Odbc.

How do I fix CVE-2026-35560?

No fix has been published for CVE-2026-35560 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-35560 being exploited?

There is no known exploitation of CVE-2026-35560 in the wild and no public exploit code.

Sources

Also known as GHSA-x5c7-h5cc-rhvj.