CVE-2026-92778
CMAK through 3.0.0.6 Feature Gate Bypass via HTML Form Routes
CVSS Score
5.4
EPSS Score
0.0%
EPSS Percentile
0th
CMAK through 3.0.0.6 fails to apply the scheduled leader election feature toggle to HTML form routes, allowing attackers to bypass the feature gate. Attackers can access the form endpoints to start and stop the recurring election scheduler, disrupting leadership across managed Kafka clusters.
| CWE | CWE-693 |
| Vendor | yahoo |
| Product | cmak |
| Published | Sep 16, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low
Affected Versions
yahoo / CMAK
0 ≤ 3.0.0.6
References
github.com: https://github.com/yahoo/CMAK/issues/936 github.com: https://github.com/yahoo/CMAK github.com: https://github.com/yahoo/CMAK/blob/3.0.0.6/app/controllers/PreferredReplicaElection.scala#L110-L143 vulncheck.com: https://www.vulncheck.com/advisories/cmak-through-3.0.0.6-feature-gate-bypass-via-html-form-routes
Credits
George Chen