CVE-2024-8391
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedIn Eclipse Vert.x version 4.3.0 to 4.5.9, the gRPC server does not limit the maximum length of message payload (Maven GAV: io.vertx:vertx-grpc-server and io.vertx:vertx-grpc-client). This is fixed in the 4.5.10 version. Note this does not affect the Vert.x gRPC server based grpc-java and Netty libraries (Maven GAV: io.vertx:vertx-grpc)
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThe Eclipse Vert.x gRPC server implementation (io.vertx:vertx-grpc-server and io.vertx:vertx-grpc-client) versions 4.3.0 through 4.5.9 lack enforce ment of maximum message payload length limits. This allows clients to send arbitrarily large or unlimited message payloads to the gRPC server, potentially causing resource exhaustion or denial-of-service conditions.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data>= 4.3.0, < 4.5.10CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify if your application uses the affected Vert.x gRPC componentsSearch your project's dependency manifest (pom.xml, build.gradle, package.json, or similar) for io.vertx:vertx-grpc-server or io.vertx:vertx-grpc-client dependenciesAffected if Either io.vertx:vertx-grpc-server or io.vertx:vertx-grpc-client appears in your dependencies (note: io.vertx:vertx-grpc is unaffected)
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Determine the installed version of the gRPC componentExtract the version number from the dependency declaration or from your compiled dependency tree (for example, running mvn dependency:tree or gradle dependencies)Affected if The version is 4.3.0 through 4.5.9 inclusive
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Verify the gRPC server is actually in useCheck your application code and configuration for gRPC server initialization, such as calls toGrpcServer(), use of @GrpcService annotations, or gRPC endpoint bindingsAffected if Your application initializes and runs a Vert.x gRPC server
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Check for payload size limits on gRPC server configurationInspect your gRPC server setup code for any maxMessageSize, maxInboundMessageSize, or similar payload limit configurationsAffected if No maximum message size limit is configured on your gRPC server
Your environment is affected if you use io.vertx:vertx-grpc-server or io.vertx:vertx-grpc-client version 4.3.0 through 4.5.9 and have a running gRPC server without configured payload size limits.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped4.5.10
Upgrade Eclipse Vert.x to version 4.5.10 or later. Verify that your application uses the affected io.vertx:vertx-grpc-server/io.vertx-grpc-client components and not the separate io.vertx:vertx-grpc which is unaffected.
Vert.x 4.5.10
- Locate the Maven pom.xml file(s) that contain the io.vertx:vertx-grpc-server and/or io.vertx:vertx-grpc-client dependencies
- Update the version attribute for both vertx-grpc-server and vertx-grpc-client dependencies to 4.5.10
- Run 'mvn clean compile' or 'mvn clean package' to rebuild the application
- Redeploy the updated application to your runtime environment
- Verify the gRPC services function correctly with the new version
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation2.0 h
- Testing3.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-8391 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2024-8391 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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