kikayli opened a new issue, #2054:
URL: https://github.com/apache/activemq/issues/2054

   Create a test queue:
   
   ```
   POST /api/message/INJ_TEST?type=queue HTTP/1.1
   Host: 127.0.0.1:8161
   Authorization: Basic YWRtaW46YWRtaW4=
   Cookie: JSESSIONID=node09avkqrvzuvhur0y8gabl2bag47.node0
   Connection: keep-alive
   Content-Type: application/x-www-form-urlencoded
   Content-Length: 9
   
   body=test
   ```
   
   Blind Injection Comparison for msgId:
   
   <img width="1090" height="426" alt="Image" 
src="https://github.com/user-attachments/assets/6e0693b6-11d0-4003-b088-2e6e9b4abd87";
 />
   
   <img width="1096" height="334" alt="Image" 
src="https://github.com/user-attachments/assets/4bd7f2ea-adc9-4e6b-bbaf-abf788737955";
 />
   
   Specific requests can be constructed to cause heap overflow:
   
   <img width="1098" height="824" alt="Image" 
src="https://github.com/user-attachments/assets/326ac964-5ede-4524-9e48-be281653bfb5";
 />
   
   The logs are as follows:
   
   ```
   Caused by: java.lang.StackOverflowError
           at 
org.apache.activemq.selector.SelectorParser.jj_3_6(SelectorParser.java:1191)
           at 
org.apache.activemq.selector.SelectorParser.jj_2_6(SelectorParser.java:687)
           at 
org.apache.activemq.selector.SelectorParser.unaryExpr(SelectorParser.java:449)
           at 
org.apache.activemq.selector.SelectorParser.multExpr(SelectorParser.java:406)
           at 
org.apache.activemq.selector.SelectorParser.addExpression(SelectorParser.java:374)
           at 
org.apache.activemq.selector.SelectorParser.comparisonExpression(SelectorParser.java:215)
           at 
org.apache.activemq.selector.SelectorParser.equalityExpression(SelectorParser.java:157)
           at 
org.apache.activemq.selector.SelectorParser.andExpression(SelectorParser.java:136)
           at 
org.apache.activemq.selector.SelectorParser.orExpression(SelectorParser.java:115)
           at 
org.apache.activemq.selector.SelectorParser.primaryExpr(SelectorParser.java:561)
           at 
org.apache.activemq.selector.SelectorParser.unaryExpr(SelectorParser.java:493)
           at 
org.apache.activemq.selector.SelectorParser.unaryExpr(SelectorParser.java:462)
           at 
org.apache.activemq.selector.SelectorParser.multExpr(SelectorParser.java:406)
           at 
org.apache.activemq.selector.SelectorParser.addExpression(SelectorParser.java:374)
           at 
org.apache.activemq.selector.SelectorParser.comparisonExpression(SelectorParser.java:215)
           at 
org.apache.activemq.selector.SelectorParser.equalityExpression(SelectorParser.java:157)
           at 
org.apache.activemq.selector.SelectorParser.andExpression(SelectorParser.java:136)
           at 
org.apache.activemq.selector.SelectorParser.orExpression(SelectorParser.java:115)
           at 
org.apache.activemq.selector.SelectorParser.primaryExpr(SelectorParser.java:561)
           at 
org.apache.activemq.selector.SelectorParser.unaryExpr(SelectorParser.java:493)
           at 
org.apache.activemq.selector.SelectorParser.unaryExpr(SelectorParser.java:462)
           at 
org.apache.activemq.selector.SelectorParser.multExpr(SelectorParser.java:406)
           at 
org.apache.activemq.selector.SelectorParser.addExpression(SelectorParser.java:374)
           at 
org.apache.activemq.selector.SelectorParser.comparisonExpression(SelectorParser.java:215)
           at 
org.apache.activemq.selector.SelectorParser.equalityExpression(SelectorParser.java:157)
           at 
org.apache.activemq.selector.SelectorParser.andExpression(SelectorParser.java:136)
           at 
org.apache.activemq.selector.SelectorParser.orExpression(SelectorParser.java:115)
   ```
   


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