CVE-2026-71576Network attack vector

Cross-hub data manipulation via unverified event source

Published Aug 10, 2026 · Updated Aug 10, 2026

Data-authenticity failure in Red Hat Multicluster Global Hub allows remote authenticated users to alter or delete other hubs' status data. The manager accepts the self-asserted CloudEvent source on Kafka status topics as the leaf-hub identity without binding it to the presenting client certificate. Exploitation requires control of a managed hub and its valid Kafka client certificate, enabling falsification or deletion of compliance, inventory, and health records for other hubs.

CVSS severity8.5
High
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Data-authenticity failure in Red Hat Multicluster Global Hub allows remote authenticated users to alter or delete other hubs' status data. The manager accepts the self-asserted CloudEvent source on Kafka status topics as the leaf-hub identity without binding it to the presenting client certificate. Exploitation requires control of a managed hub and its valid Kafka client certificate, enabling falsification or deletion of compliance, inventory, and health records for other hubs.

The record

CVE
CVE-2026-71576
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
389 Directory Server
Product
Multicluster Global Hub
Classifications
CWE-345, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

389 Directory Server · Multicluster Global HubAffected versions are unavailable in this record.

Published CVSS scores

8.5Red HatCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-345Insufficient Verification of Data Authenticity
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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