Summary
Babylon's malformed vote extensions are not rejected
Adversarial validators can send large vote extensions by using non-existing protobuf tags. This will result in the rejection of the subsequent block proposal. Eventually, all block proposals will be rejected by all validators.
Impact
A small group of adversarial validators can cause a chain halt.
The application allocates resources such as memory, threads, or file descriptors based on untrusted input without enforcing a cap. Typical impact: resource exhaustion leading to denial of service.
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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Frequently Asked Questions
- What is GHSA-2FCV-QWW3-9V6H? GHSA-2FCV-QWW3-9V6H is a high-severity allocation of resources without limits or throttling vulnerability in github.com/babylonlabs-io/babylon/v4 (go), affecting versions < 4.1.0. It is fixed in 4.1.0. The application allocates resources such as memory, threads, or file descriptors based on untrusted input without enforcing a cap.
- Which versions of github.com/babylonlabs-io/babylon/v4 are affected by GHSA-2FCV-QWW3-9V6H? github.com/babylonlabs-io/babylon/v4 (go) versions < 4.1.0 is affected.
- Is there a fix for GHSA-2FCV-QWW3-9V6H? Yes. GHSA-2FCV-QWW3-9V6H is fixed in 4.1.0. Upgrade to this version or later.
- Is GHSA-2FCV-QWW3-9V6H exploitable, and should I be worried? Whether GHSA-2FCV-QWW3-9V6H 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 GHSA-2FCV-QWW3-9V6H 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 GHSA-2FCV-QWW3-9V6H? Upgrade
github.com/babylonlabs-io/babylon/v4to 4.1.0 or later.