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VulnerabilityPublished Updated

CVE-2026-71576: multicluster-global-hub · CWE-345

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Authoritative record:CVE-2026-71576· High 8.5

Not known to be exploited · CVSS 8.5 High : patch Multicluster Global Hub 1.4.9 soon.

Data as of 13 Nov 2026, 23:54 UTC

CVSS 3.1 base score
8.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 22% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 10 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Red HatMulticluster Global Hub 1.4.9Affected–Fixed in–
Red HatMulticluster Global Hub 1.5.8Affected–Fixed in–
Red HatMulticluster Global Hub 1.6.6Affected–Fixed in–
Red HatMulticluster Global Hub 1.7.3Affected–Fixed in–
Red HatMulticluster Global Hub 1.8.2Affected–Fixed in–

AI-suggested

Red Hat has released official security updates for multicluster-global-hub versions 1.4.9 and 1.7.3 that address this vulnerability. Users should apply these updates promptly by upgrading to these fixed versions or later. Refer to the Red Hat advisories RHSA-2026:67516 and RHSA-2026:67842 for detailed patch information and updated container images. No additional mitigations are specified beyond applying these official fixes.

Description

A vulnerability in the multicluster-global-hub manager component allows improper validation of the source identity of incoming CloudEvents on Kafka status topics. An attacker who has compromised a managed hub and obtained its Kafka client certificate can manipulate the source identity to falsify or delete critical data such as compliance, inventory, and cluster health information belonging to other hubs. This flaw has a high severity rating with a CVSS score of 8.5. Red Hat has released security advisories with updated versions addressing this issue.

References

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