diff --git a/changelog/unreleased/SOLR-18108.yml b/changelog/unreleased/SOLR-18108.yml
new file mode 100644
index 000000000000..e80fa568e029
--- /dev/null
+++ b/changelog/unreleased/SOLR-18108.yml
@@ -0,0 +1,8 @@
+# See https://github.com/apache/solr/blob/main/dev-docs/changelog.adoc
+title: Remove the deprecated getRequestUrl method from AuditEvent
+type: removed # added, changed, fixed, deprecated, removed, dependency_update, security, other
+authors:
+  - name: Eric Pugh
+links:
+  - name: SOLR-18108
+    url: https://issues.apache.org/jira/browse/SOLR-18108
diff --git a/solr/core/src/java/org/apache/solr/security/AuditEvent.java b/solr/core/src/java/org/apache/solr/security/AuditEvent.java
index dc7de8b572b9..e3367e8d8ea2 100644
--- a/solr/core/src/java/org/apache/solr/security/AuditEvent.java
+++ b/solr/core/src/java/org/apache/solr/security/AuditEvent.java
@@ -19,7 +19,6 @@
 import static org.apache.solr.security.AuditEvent.EventType.ANONYMOUS;
 import static org.apache.solr.security.AuditEvent.EventType.ERROR;
 
-import com.fasterxml.jackson.annotation.JsonIgnore;
 import jakarta.servlet.http.HttpServletRequest;
 import java.lang.invoke.MethodHandles;
 import java.security.Principal;
@@ -100,7 +99,7 @@ public enum EventType {
 
   /**
    * Empty event, must be filled by user using setters. Message and Loglevel will be initialized
-   * from EventType but can be overridden with setters afterwards.
+   * from EventType but can be overridden with setters afterward.
    *
    * @param eventType a predefined or custom EventType
    */
@@ -121,7 +120,7 @@ protected AuditEvent() {}
 
   /**
    * Event based on an HttpServletRequest, typically used during authentication. Solr will fill in
-   * details such as ip, http method etc from the request, and username if Principal exists on the
+   * details such as ip, http method etc. from the request, and username if Principal exists on the
    * request.
    *
    * @param eventType a predefined or custom EventType
@@ -163,7 +162,7 @@ public AuditEvent(EventType eventType, Throwable exception, HttpServletRequest h
 
   /**
    * Event based on request and AuthorizationContext. Solr will fill in details such as collections,
-   * ip, http method etc from the context.
+   * ip, http method etc. from the context.
    *
    * @param eventType a predefined or custom EventType
    * @param httpRequest the request to initialize from
@@ -192,7 +191,7 @@ public AuditEvent(
 
   /**
    * Event to log completed requests. Takes time and status. Solr will fill in details such as
-   * collections, ip, http method etc from the HTTP request and context.
+   * collections, ip, http method etc. from the HTTP request and context.
    *
    * @param eventType a predefined or custom EventType
    * @param httpRequest the request to initialize from
@@ -248,7 +247,7 @@ static RequestType convertType(AuthorizationContext.RequestType ctxReqType) {
     }
   }
 
-  /** The human readable message about this event */
+  /** The human-readable message about this event */
   public String getMessage() {
     return message;
   }
@@ -267,7 +266,7 @@ public Date getDate() {
     return date;
   }
 
-  /** Username of logged in user, or null if no authenticated user */
+  /** Username of logged-in user, or null if no authenticated user */
   public String getUsername() {
     return username;
   }
@@ -349,7 +348,7 @@ public Map<String, List<String>> getSolrParams() {
    * Gets first value of a certain Solr request parameter
    *
    * @param key name of request parameter to retrieve
-   * @return String value of the first value, regardless of number of valies
+   * @return String value of the first value, regardless of number of values
    */
   public String getSolrParamAsString(String key) {
     List<String> v = getSolrParams().get(key);
@@ -393,19 +392,6 @@ public Throwable getException() {
     return exception;
   }
 
-  /**
-   * Get baseUrl as StringBuffer for back compat with previous version
-   *
-   * @deprecated Please use {@link #getBaseUrl()} instead
-   * @return StringBuffer of the base url without query part
-   */
-  @Deprecated
-  @JsonIgnore
-  @SuppressWarnings("JdkObsolete")
-  public StringBuffer getRequestUrl() {
-    return new StringBuffer(baseUrl);
-  }
-
   /**
    * Full URL of the original request. This is {@link #baseUrl} + "?" + {@link #httpQueryString}.
    * Returns null if not set
@@ -580,11 +566,11 @@ protected String normalizeResourcePath(String resourcePath) {
       Arrays.asList(".*/select.*", ".*/query.*");
 
   private static final List<Pattern> ADMIN_PATH_PATTERNS =
-      ADMIN_PATH_REGEXES.stream().map(Pattern::compile).collect(Collectors.toList());
+      ADMIN_PATH_REGEXES.stream().map(Pattern::compile).toList();
   private static final List<Pattern> STREAMING_PATH_PATTERNS =
-      STREAMING_PATH_REGEXES.stream().map(Pattern::compile).collect(Collectors.toList());
+      STREAMING_PATH_REGEXES.stream().map(Pattern::compile).toList();
   private static final List<Pattern> INDEXING_PATH_PATTERNS =
-      INDEXING_PATH_REGEXES.stream().map(Pattern::compile).collect(Collectors.toList());
+      INDEXING_PATH_REGEXES.stream().map(Pattern::compile).toList();
   private static final List<Pattern> SEARCH_PATH_PATTERNS =
-      SEARCH_PATH_REGEXES.stream().map(Pattern::compile).collect(Collectors.toList());
+      SEARCH_PATH_REGEXES.stream().map(Pattern::compile).toList();
 }
diff --git a/solr/core/src/test/org/apache/solr/security/AuditLoggerPluginTest.java b/solr/core/src/test/org/apache/solr/security/AuditLoggerPluginTest.java
index 32dec1774331..3e2b3165cca9 100644
--- a/solr/core/src/test/org/apache/solr/security/AuditLoggerPluginTest.java
+++ b/solr/core/src/test/org/apache/solr/security/AuditLoggerPluginTest.java
@@ -229,8 +229,6 @@ public void jsonEventFormatter() {
   @Test
   public void getBaseUrl() {
     assertEquals("http://myserver/mypath", EVENT_WITH_URL.getBaseUrl());
-    // Deprecated
-    assertEquals("http://myserver/mypath", EVENT_WITH_URL.getRequestUrl().toString());
   }
 
   @Test