Apache Impala 4.0+ SAML2 Bearer Token Signature Not Verified in hs2-http
CVE-2026-56207 Published on September 9, 2026
Apache Impala: SAML authentication bypass via forged bearer token
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.
Vulnerability Analysis
CVE-2026-56207 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
Improper Verification of Cryptographic Signature
The software does not verify, or incorrectly verifies, the cryptographic signature for data.
Products Associated with CVE-2026-56207
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Affected Versions
Apache Software Foundation Apache Impala:- Version 4.0.0, <= 4.5.1 is affected.