jmestwa-coder commented on code in PR #12410:
URL: https://github.com/apache/maven/pull/12410#discussion_r3546104147


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compat/maven-model-builder/src/main/java/org/apache/maven/model/validation/DefaultModelValidator.java:
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@@ -1160,6 +1163,15 @@ private boolean isValidId(String id) {
         return true;
     }
 
+    /**
+     * An id or version made up only of {@code .} or {@code ..} is a 
filesystem path-traversal segment. The dotted

Review Comment:
   fair point, I don't have evidence that `.` or `..` are illegal names as 
such. the actual problem is the default local repository layout using 
artifactId/version verbatim as directory names, which turns these values into 
literal `.`/`..` path segments. reworded the javadoc in both validators to say 
the rejection is due to that mapping, not the names themselves.



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