CVE-2026-56207 Apache Impala - Authentication Bypass

Apache Impala >=4.0.0 contains a broken authentication caused by lack of signature verification of Bearer token in the last step of SAML2 authentication for hs2-http interface, letting attackers alter user names and impersonate other users, exploit requires crafted Bearer token.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
EPSS
0.46% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Broken Authentication
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
9 September 2026
Updated
15 October 2026
Weakness
CWE-347

Vendor fix

Upgrade to version 4.5.2.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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