SAML2 Authentication Vulnerability in Apache Impala
CVE-2026-56207

9.8CRITICAL

Key Information:

Vendor

Apache
Status
Apache Impala
Vendor
CVE Published:
9 September 2026

What is CVE-2026-56207?

A vulnerability in Apache Impala's SAML2 authentication process permits an attacker to bypass signature verification of Bearer tokens during the final step of authentication. This oversight can lead to unauthorized user impersonation, allowing the attacker to alter the user name and act as another legitimate user. It is highly recommended that users upgrade to version 4.5.2 to mitigate this security risk.

Affected Version(s)

Apache Impala 4.0.0 <= 4.5.1

References

https://lists.apache.org/thread/20cov78py0zqzx7dyq39ktyth...
vendor-advisory

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Andrew Rukin (Arenadata)
.