CVE-2026-56207: Apache Impala

Critical severity, CVSS 9.8. EPSS: 0.5% chance of exploitation in the next 30 days.

Signature of Bearer token is not verified in last step of SAML2 authentication for Impala's hs2-http interface, allowing altering user name and acting as another user. This issue affects Apache Impala: >=4.0.0. Users are recommended to upgrade to version 4.5.2, which fixes this issue.

Affected products

• Apache Impala: from 4.0.0, before 4.5.2 (fixed in 4.5.2)

Published 2026-09-09. Last modified 2026-09-10.