CVE-2026-71467 (GCVE-0-2026-71467)

Vulnerability from cvelistv5 – Published: 2026-08-11 19:22 – Updated: 2026-08-26 21:39
VLAI
Title
Acm-search-v2-api-rhel9: search-v2-api: authentication bypass on /federated via upgrade: websocket header spoofing
Summary
A flaw was found in search-v2-api. The authentication middleware in the affected component unconditionally skips authentication when a request includes an `Upgrade: websocket` header. An unauthenticated attacker can exploit this by sending a specially crafted HTTP POST request to the `/federated` endpoint with the `Upgrade: websocket` header. This allows the attacker to bypass authentication and access federated search results across all configured remote managed hubs, leading to information disclosure.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-11 20:08 UTC
CWE
  • CWE-287 - Improper Authentication
Assigner
redhat CNA under the redhat root
CNA scorecard B 82/100 over 1212 records in the last 180 days details
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:60386 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-71467 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2512146 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version CPE status
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17 Unaffected: 1787229541 , < * (rpm)
    cpe:/a:redhat:acm:2.17::el9
Create a notification for this product.
Date Public
2026-08-11 12:00
Show details on NVD website
To clipboard 

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Workarounds

CNA · redhat
To mitigate this vulnerability, ensure the `FEATURE_FEDERATED_SEARCH` is disabled if not actively used. This feature is off by default in standard deployments of Red Hat Advanced Cluster Management for Kubernetes. For Global Hub deployments where `FEATURE_FEDERATED_SEARCH` is enabled by default, consider restricting network access to the `search-v2-api`'s `/federated` endpoint to trusted clients.

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