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TI-2025-38105 Aliases CVE-2025-61673

Karapace is vulnerable to Authentication Bypass

Priority MEDIUM 43CWE-288Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
Low · High · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-288.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00394 33rd percentileScored 2026-11-07
Fix Fixed karapace (Aiven-Open): 5.0.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Aiven-Openkarapace5.0.0 to before 5.0.25.0.2Patch availableCNA
  • karapace VendorAiven-Open Affected 5.0.0 to before 5.0.2 Fixed in 5.0.2 Patch available CNA

Remediation

  • Fix · CNA karapace (Aiven-Open) Fixed in 5.0.2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-61673

References

Other 3

  • TI-2025-34940 aiven-db-migrate allows Privilege Escalation through use of psql during migration CVSS 3.1CRITICAL 9.1
  • TI-2025-22661 aiven-extras allows PostgreSQL Privilege Escalation through format function CVSS 3.1CRITICAL 9.1
  • TI-2025-34939 aiven-db-migrate allows Privilege Escalation via unrestricted search_path during migration CVSS 3.1CRITICAL 9.1
  • TI-2026-79625 Path traversal in PGHoard restore allows arbitrary file writes CVSS 3.1HIGH 8.4
  • TI-2023-15599 aiven-extras PostgreSQL Privilege Escalation Through Overloaded Search Path CVSS 3.1HIGH 8.8
  • TI-2026-32927 Klaw: Improper Access Control Allows Disclosure of Password Hash CVSS 4.0MEDIUM 6.9
See all 15 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences