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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.

PUBLISHED Reserved 2025-09-29 | Published 2025-10-03 | Updated 2025-10-06 | Assigner GitHub_M




HIGH: 8.6CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

Problem types

CWE-306: Missing Authentication for Critical Function

CWE-288: Authentication Bypass Using an Alternate Path or Channel

Product status

>= 5.0.0, < 5.0.2
affected

References

github.com/...rapace/security/advisories/GHSA-vq25-vcrw-gj53

github.com/...mmits/c4038e9ce9fa504b433d59ac2944e337292922c7

github.com/Aiven-Open/karapace/releases/tag/5.0.2

cve.org (CVE-2025-61673)

nvd.nist.gov (CVE-2025-61673)

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