Summary
Cube API denial of service attack
Workarounds
There are currently no workaround for older versions, and the recommendation is to upgrade.
References
The issue was reported by y0d3n in our Community Slack and has been promptly patched in the recent update.
Impact
It is possible to make the entire Cube API unavailable by submitting a specially crafted request to a Cube API endpoint.
The application does not adequately validate input before processing it, allowing unexpected values to reach sensitive code paths. Typical impact: varies by context: data corruption, logic bypass, or denial of service.
CVE-2023-50709 has a CVSS score of 6.5 (Medium). The vector is network-reachable, low privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (0.34.34); upgrading removes the vulnerable code path.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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See it in your environmentNew to Kodem? Get a demo →Remediation advice
The issue has been patched in the v0.34.34 and it's recommended that all users exposing Cube APIs to the public internet upgrade to the latest version to prevent service disruption.
Frequently Asked Questions
- What is CVE-2023-50709? CVE-2023-50709 is a medium-severity improper input validation vulnerability in @cubejs-backend/api-gateway (npm), affecting versions < 0.34.34. It is fixed in 0.34.34. The application does not adequately validate input before processing it, allowing unexpected values to reach sensitive code paths.
- How severe is CVE-2023-50709? CVE-2023-50709 has a CVSS score of 6.5 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
- Which versions of @cubejs-backend/api-gateway are affected by CVE-2023-50709? @cubejs-backend/api-gateway (npm) versions < 0.34.34 is affected.
- Is there a fix for CVE-2023-50709? Yes. CVE-2023-50709 is fixed in 0.34.34. Upgrade to this version or later.
- Is CVE-2023-50709 exploitable, and should I be worried? Whether CVE-2023-50709 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2023-50709 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2023-50709? Upgrade
@cubejs-backend/api-gatewayto 0.34.34 or later.