CVE-2026-56207

CRITICAL CVSS 3.1: 9.8 EPSS 0.47%
Updated Sep 10, 2026
Apache
Parameter Value
CVSS 9.8 (CRITICAL)
Affected Versions 4.0.0 — 4.5.2
Fixed In 4.5.2
Type CWE-347 (Improper Verification of Cryptographic Signature)
Vendor Apache
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Apache Impala
cpe:2.3:a:apache:impala:*:*:*:*:*:*:*:*
4.0.0 4.5.2