# Quarkus 3.27.5

- Product: Quarkus (https://whatsnew.fyi/product/quarkus)
- Vendor: Red Hat
- Date: 2026-07-29
- Version: 3.27.5
- Original notes: https://github.com/quarkusio/quarkus/releases/tag/3.27.5
- Permalink: https://whatsnew.fyi/product/quarkus/releases/3.27.5

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **fixed** — Fix ContextNotActiveException in the middle of a request handler
- **fixed** — Fix CDI request context activation race when Quarkus REST and Reactive Routes are used during the same request
- **fixed** — Fix Lambda extension NoSuchMethodError on startup by merging LambdaConfig with same fully qualified name
- **fixed** — Fix null Vert.x log messages showing as NULL in native mode
- **fixed** — Fix memory leak in REST Client reactive pipelines
- **changed** — Harden OIDC debug logs
- **changed** — Bump Agroal to 2.8.2
- **changed** — Bump to Vert.x 4.5.28 and Netty 4.1.135.Final
- **changed** — Bump Hibernate to latest updates
- **changed** — Switch from org.fusesource.jansi to org.jline:jansi
- **changed** — Reduce allocation in HTTP instrumentation
- **changed** — Bump Jackson to 2.21.4
- **changed** — Bump com.ongres.scram:scram-client from 3.2 to 3.3
- **fixed** — Apply DevUI CORS and Host checks to DevMCP

###### Complete changelog

  * [#51230](https://github.com/quarkusio/quarkus/issues/51230) - ContextNotActiveException in the middle of a request handler
  * [#51299](https://github.com/quarkusio/quarkus/pull/51299) - Fix CDI request context activation race when Quarkus REST and Reactive Routes are used during the same request
  * [#51408](https://github.com/quarkusio/quarkus/issues/51408) - Lambda extension: Failed to start quarkus because of NoSuchMethodError
  * [#51410](https://github.com/quarkusio/quarkus/pull/51410) - Merge LambdaConfig with same FQN
  * [#54201](https://github.com/quarkusio/quarkus/pull/54201) - [3.27] Harden OIDC debug logs
  * [#54597](https://github.com/quarkusio/quarkus/pull/54597) - Fix null Vert.x log messages showing as NULL in native mode
  * [#54615](https://github.com/quarkusio/quarkus/pull/54615) - [3.27] Bump Agroal to 2.8.2
  * [#54639](https://github.com/quarkusio/quarkus/issues/54639) - Memory Leak with Quarkus Rest Client in a Reactive pipeline
  * [#54649](https://github.com/quarkusio/quarkus/pull/54649) - Bump to Vert.x 4.5.28 and Netty 4.1.135.Final
  * [#54659](https://github.com/quarkusio/quarkus/pull/54659) - Fix memory leak in REST Client reactive pipelines
  * [#54738](https://github.com/quarkusio/quarkus/pull/54738) - [3.27] Bump the hibernate group with 8 updates
  * [#54908](https://github.com/quarkusio/quarkus/pull/54908) - Bump graalvm/setup-graalvm from v1.5.3 to v1.5.6
  * [#55006](https://github.com/quarkusio/quarkus/pull/55006) - Bump the hibernate group across 1 directory with 7 updates
  * [#55026](https://github.com/quarkusio/quarkus/pull/55026) - [3.27] Switch from org.fusesource.jansi to org.jline:jansi
  * [#55030](https://github.com/quarkusio/quarkus/pull/55030) - Reduce allocation in HTTP instrumentation
  * [#55109](https://github.com/quarkusio/quarkus/pull/55109) - [3.27] Bump jackson to 2.21.4
  * [#55163](https://github.com/quarkusio/quarkus/pull/55163) - [3.27] Bump the hibernate group across 1 directory with 7 updates
  * [#55229](https://github.com/quarkusio/quarkus/pull/55229) - Bump com.ongres.scram:scram-client from 3.2 to 3.3 in /bom/application
  * [#55353](https://github.com/quarkusio/quarkus/pull/55353) - Apply DevUI CORS and Host checks to DevMCP