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@snyk-io snyk-io bot commented Jan 16, 2026

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Snyk has created this PR to fix 1 vulnerabilities in the maven dependencies of this project.

Snyk changed the following file(s):

  • samples/client/petstore/java/vertx/pom.xml

Vulnerabilities that will be fixed with an upgrade:

Issue Score Upgrade
medium severity HTTP Request Smuggling
SNYK-JAVA-IOVERTX-14988768
  50   io.vertx:vertx-rx-java:
3.4.2 -> 4.5.24
io.vertx:vertx-web-client:
3.4.2 -> 4.5.24
Major version upgrade No Path Found No Known Exploit

Important

  • Check the changes in this PR to ensure they won't cause issues with your project.
  • Max score is 1000. Note that the real score may have changed since the PR was raised.
  • This PR was automatically created by Snyk using the credentials of a real user.

Note: You are seeing this because you or someone else with access to this repository has authorized Snyk to open fix PRs.

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snyk-io bot commented Jan 16, 2026

Snyk checks have passed. No issues have been found so far.

Status Scanner Critical High Medium Low Total (0)
Open Source Security 0 0 0 0 0 issues
Licenses 0 0 0 0 0 issues

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snyk-io bot commented Jan 16, 2026

Merge Risk: High

This is a major version upgrade from Vert.x 3 to 4, which introduces significant breaking changes. Code modifications are required for this upgrade.

Key Breaking Changes:

  • Asynchronous Model: Vert.x 4 prioritizes Future-based asynchronous operations over the previous callback-style. Many methods now return a Future instead of taking a Handler. [1, 9]
  • RxJava Migration: vertx-rx-java for RxJava 1 is replaced. You must migrate to the vertx-rx-java3 artifact and update all package imports from io.vertx.rxjava to io.vertx.rxjava3. [1]
  • API Removals: Numerous APIs deprecated in version 3 have been removed. For example, EventBus.send() is replaced by EventBus.request(). [1]

Source: Vert.x 3 to 4 Migration Guide
Recommendation: This upgrade requires a careful, manual migration. Developers must follow the official migration guide to update asynchronous handling, RxJava dependencies, and removed API calls.

Notice 🤖: This content was augmented using artificial intelligence. AI-generated content may contain errors and should be reviewed for accuracy before use.

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