Vulnerability · Published Sep 16, 2026 · Assigned by VulnCheck
CVE-2026-92778CMAK through 3.0.0.6 Feature Gate Bypass via HTML Form Routes
Medium 5.4
In plain English
A medium-severity security flaw in CMAK from yahoo. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).
Severity (CVSS 3.1)5.4Medium
Exploit odds (30 days)0.4%top 61.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
Weakness: CWE-693 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
References
- GitHub Issue #936 issue-tracking
- https://github.com/yahoo/CMAK product
- the HTML form action has no featureGate while the API action at 141 does technical-description
- VulnCheck Advisory: CMAK through 3.0.0.6 Feature Gate Bypass via HTML Form Routes third-party-advisory