CVE-2025-61673

HIGH EPSS 29.4%
Published Oct 3, 20259mo ago · Modified Jun 17, 20262w ago
8.6 CVSS 3.1
High
Find Similar
Published Oct 3, 2025 9mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
8.6
Exploitability
3.9
Impact
4.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity High
Availability Low

Threat Intelligence

EPSS Exploit Probability
29.4% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 2

CWE-288
CWE-306 Missing Authentication for Critical Function Authentication

References 3

  • github.com https://github.com/Aiven-Open/karapace/pull/1143/commits/c4038e9ce9fa504b433d59ac2944e337292922c7
  • github.com https://github.com/Aiven-Open/karapace/releases/tag/5.0.2
  • github.com https://github.com/Aiven-Open/karapace/security/advisories/GHSA-vq25-vcrw-gj53

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.