Karapace is an open-source implementation of Kafka REST and Schema Registry. Versions 5.0.0 and 5.0.1 contain an authentication bypass vulnerability when configured to use OAuth 2.0 Bearer Token authentication. If a request is sent without an Authorization header, the token validation logic is skipped entirely, allowing an unauthenticated user to read and write to Schema Registry endpoints that should otherwise be protected. This effectively renders the OAuth authentication mechanism ineffective. This issue is fixed in version 5.0.2.
History

Mon, 06 Oct 2025 14:45:00 +0000

Type Values Removed Values Added
First Time appeared Aiven
Aiven aiven
Aiven karapace
Vendors & Products Aiven
Aiven aiven
Aiven karapace

Mon, 06 Oct 2025 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Fri, 03 Oct 2025 21:30:00 +0000

Type Values Removed Values Added
Description Karapace is an open-source implementation of Kafka REST and Schema Registry. Versions 5.0.0 and 5.0.1 contain an authentication bypass vulnerability when configured to use OAuth 2.0 Bearer Token authentication. If a request is sent without an Authorization header, the token validation logic is skipped entirely, allowing an unauthenticated user to read and write to Schema Registry endpoints that should otherwise be protected. This effectively renders the OAuth authentication mechanism ineffective. This issue is fixed in version 5.0.2.
Title Karapace is vulnerable to Authentication Bypass
Weaknesses CWE-288
CWE-306
References
Metrics cvssV3_1

{'score': 8.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2025-10-03T21:12:24.471Z

Updated: 2025-10-06T13:19:08.624Z

Reserved: 2025-09-29T20:25:16.180Z

Link: CVE-2025-61673

cve-icon Vulnrichment

Updated: 2025-10-06T13:18:54.419Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-10-03T22:15:32.213

Modified: 2025-10-06T14:56:47.823

Link: CVE-2025-61673

cve-icon Redhat

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