CVE-2026-56207
Received Received - Intake

SAML2 Authentication Bypass in Apache Impala

Publication date: 2026-09-09

Last updated on: 2026-09-09

Assigner: Apache Software Foundation

Description
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.

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Meta Information

Published
2026-09-09
Last Modified
2026-09-09
Generated
2026-09-09
AI Q&A
2026-09-09
EPSS Evaluated
N/A
NVD
CVE-2026-56207
EUVD
EUVD-2026-74797

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
apache impala 4.5.2
apache impala From 4.0.0 (inc)
apache impala From 4.0.0 (inc) to 4.5.1 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-347 The product does not verify, or incorrectly verifies, the cryptographic signature for data.

Attack-Flow Graph

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Executive Summary

This vulnerability involves a flaw in Apache Impala's SAML2 authentication process for the hs2-http interface. The Bearer token's signature is not verified during the final step, allowing attackers to modify the username and impersonate other users.

Impact Analysis

An attacker could exploit this to alter their username and impersonate another user, potentially gaining unauthorized access to sensitive data or performing actions on behalf of other users.

Mitigation Strategies

Upgrade Apache Impala to version 4.5.2 or later to fix the SAML2 Bearer token signature verification issue in the hs2-http interface.

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