CVE-2026-71576 Missing authorization in Multicluster Global Hub 1.4.9
Attackers can falsify or delete critical cluster data by manipulating self-asserted source identities in CloudEvents due to improper validation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-71576?
CVE-2026-71576 is a high-severity missing authorization vulnerability in Red Hat Multicluster Global Hub 1.4.9, published on 10 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A flaw was found in multicluster-global-hub. The manager component improperly validates the source identity of incoming CloudEvents on Kafka status topics. A remote attacker, after compromising a managed hub and obtaining its Kafka client certificate, can manipulate the self-asserted source identity. This allows the attacker to falsify or delete critical data, such as compliance, inventory, and cluster health information, belonging to other hubs in the database.
Weakness: CWE-345
Which versions are affected by CVE-2026-71576?
How do I fix CVE-2026-71576?
No fix has been published for CVE-2026-71576 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-71576 being exploited?
There is no known exploitation of CVE-2026-71576 in the wild and no public exploit code.
Sources
Also known as GHSA-q5c4-r3vh-f379.