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Medium, CVSS 6.9

Vertx gRPC server does not limit the maximum message size

CVE-2024-8391GHSA-g76f-gjfx-4rpr

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (io.vertx:vertx-grpc-server 4.5.10; io.vertx:vertx-grpc-client 4.5.10), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X · score source
EPSS
  • CVE-2024-8391: 0.58% estimated exploitation activity in the next 30 days; percentile 47.75 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

In 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)

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-g76f-gjfx-4rpr

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2024-8391

Advisory: Vertx gRPC server does not limit the maximum message size
IDs: CVE-2024-8391, GHSA-g76f-gjfx-4rpr
Record: https://patchnext.com/advisories/cve-2024-8391 (revision 1, source checked 26 Oct 2026, 16:31 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.9)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: io.vertx:vertx-grpc-server 4.5.10; io.vertx:vertx-grpc-client 4.5.10. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven io.vertx:vertx-grpc-server: affected >= 4.3.0, < 4.5.10; fixed in 4.5.10
- Maven io.vertx:vertx-grpc-client: affected >= 4.3.0, < 4.5.10; fixed in 4.5.10

## Suggested inspection (read-only)
- Maven io.vertx:vertx-grpc-server: check the installed version with your package manager.
- Maven io.vertx:vertx-grpc-client: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on io.vertx:vertx-grpc-server, io.vertx:vertx-grpc-client.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-g76f-gjfx-4rpr (GitHub-reviewed advisory GHSA-g76f-gjfx-4rpr lists affected ranges: Maven io.vertx:vertx-grpc-server >=4.3.0 =4.3.0 <4.5.10)

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