CVE-2026-56207

Apache Impala: SAML authentication bypass via forged bearer token

Published Sep 9, 2026 CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Apache
Apache impala
CPEs cpe:2.3:a:apache:impala:*:*:*:*:*:*:*:*
Vendors & Products Apache
Apache impala
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Apache Impala: SAML authentication bypass via forged bearer token
Weaknesses CWE-347
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
apache
Published
Updated
Sep 10, 2026, 5:58 PM
Reserved
Jun 19, 2026, 3:49 PM
Status
Analyzed
Published
Sep 9, 2026, 11:17 AM
Modified
Sep 10, 2026, 8:38 PM