Upgrade to Spring Framework 5.3.18

[snicoll]

No description provided.

[mcs]

The fix is still not available in Maven Central although released on the GitHub page almost 2 hours ago.
Problem with the build pipeline? The 2.5.12 artifact was available at Maven Central quite fast after its GitHub release.

[scottfrederick]

The Spring Boot 2.6.6 artifacts are in Maven Central (for example https://repo1.maven.org/maven2/org/springframework/boot/spring-boot/2.6.6/). If you're using https://search.maven.org, it sometimes takes a while for the search index to update. If you're having issues building with Gradle, see #30414 (comment).

[mcs]

All right, Maven Search is the issue:
https://search.maven.org/artifact/org.springframework.boot/spring-boot-starter-parent/2.6.6/pom
That's the one I was waiting for, and which is not available in the index, but via https://repo1.maven.org/maven2/org/springframework/boot/spring-boot-starter-parent/2.6.6/
all is fine. Thanks for clarification.