diff --git a/cli/lucli/services/rustcfml/RustCFMLEngine.cfc b/cli/lucli/services/rustcfml/RustCFMLEngine.cfc
index 2ea9deaed4..0adde22e5a 100644
--- a/cli/lucli/services/rustcfml/RustCFMLEngine.cfc
+++ b/cli/lucli/services/rustcfml/RustCFMLEngine.cfc
@@ -32,7 +32,7 @@ component {
 	 * check-version.sh bumps ENGINE_VERSION, and RustCFMLEnginePinSpec fails
 	 * on drift (#3812).
 	 */
-	variables.engineVersion = "v0.738.1";
+	variables.engineVersion = "v0.738.4";
 
 	/**
 	 * sha256 of each release asset of the pinned version. install() refuses a
@@ -42,9 +42,9 @@ component {
 	 * on drift.
 	 */
 	variables.engineSha256 = {};
-	variables.engineSha256["rustcfml-linux-aarch64"] = "1326a09463864ef080a50f67a35086b24966aaeba45d4ac2201ff9b5bea18e54";
-	variables.engineSha256["rustcfml-linux-x86_64"] = "5ad1f9de637312d2c8ca73436ab4d90c174e462e5c6407f5e6aec63450414eaa";
-	variables.engineSha256["rustcfml-macos-aarch64"] = "4189be86c18cf4c7e4dec0cadf145f38fd135376914254b70c49ef3a251d8e9d";
+	variables.engineSha256["rustcfml-linux-aarch64"] = "105b239da2a0fb5059c1f6a07e7ec7dc0e25321364d4f6bc66b9765c7cfd3d36";
+	variables.engineSha256["rustcfml-linux-x86_64"] = "8bcb1c7e0e97bde1ceb9bb6e2769d43348ea5292d40599a746ca9c56b8a9eaa9";
+	variables.engineSha256["rustcfml-macos-aarch64"] = "b032091f8cb49c7baaf5cb47fdb0fefe40be630dd53ee8f104794ec5bba7f99f";
 
 	variables.wheelsHome = "";
 
diff --git a/tools/rustcfml/ENGINE_SHA256 b/tools/rustcfml/ENGINE_SHA256
index d05fe11799..e1cf756210 100644
--- a/tools/rustcfml/ENGINE_SHA256
+++ b/tools/rustcfml/ENGINE_SHA256
@@ -1,3 +1,3 @@
-1326a09463864ef080a50f67a35086b24966aaeba45d4ac2201ff9b5bea18e54  rustcfml-linux-aarch64
-5ad1f9de637312d2c8ca73436ab4d90c174e462e5c6407f5e6aec63450414eaa  rustcfml-linux-x86_64
-4189be86c18cf4c7e4dec0cadf145f38fd135376914254b70c49ef3a251d8e9d  rustcfml-macos-aarch64
+105b239da2a0fb5059c1f6a07e7ec7dc0e25321364d4f6bc66b9765c7cfd3d36  rustcfml-linux-aarch64
+8bcb1c7e0e97bde1ceb9bb6e2769d43348ea5292d40599a746ca9c56b8a9eaa9  rustcfml-linux-x86_64
+b032091f8cb49c7baaf5cb47fdb0fefe40be630dd53ee8f104794ec5bba7f99f  rustcfml-macos-aarch64
diff --git a/tools/rustcfml/ENGINE_VERSION b/tools/rustcfml/ENGINE_VERSION
index 40c615c5c1..df023cc8a9 100644
--- a/tools/rustcfml/ENGINE_VERSION
+++ b/tools/rustcfml/ENGINE_VERSION
@@ -1 +1 @@
-v0.738.1
+v0.738.4
diff --git a/tools/rustcfml/baseline.json b/tools/rustcfml/baseline.json
index 4083e13f70..ceb8dda6a2 100644
--- a/tools/rustcfml/baseline.json
+++ b/tools/rustcfml/baseline.json
@@ -1,15 +1,15 @@
 {
-  "engineVersion": "v0.738.1",
+  "engineVersion": "v0.738.4",
   "totals": {
-    "totalSpecs": 7469,
-    "totalPass": 7292,
+    "totalSpecs": 7470,
+    "totalPass": 7293,
     "totalFail": 0,
     "totalError": 0,
     "totalSkipped": 177
   },
   "failing": [],
   "_notes": [
-    "Baseline written by run-suite.sh --write-baseline from https://github.com/wheels-dev/wheels/actions/runs/39280470253 (35ceae7b4, v0.738.1, Linux): 7292 pass / 0 fail / 0 error / 177 skipped. totalSpecs is the sum of those reported categories.",
+    "Baseline written by run-suite.sh --write-baseline from https://github.com/wheels-dev/wheels/actions/runs/39612824536 (1ab638cf3, v0.738.4, Linux): 7293 pass / 0 fail / 0 error / 177 skipped. totalSpecs is the sum of those reported categories.",
     "RustCFML#431 (an exception thrown from an included template lost its custom type and detail, so TestClient assertNotFound() saw 500 instead of 404) is fixed in v0.693.0 (https://github.com/RustCFML/RustCFML/issues/431, closed 2026-09-28). Its baseline entry is removed; the strict 404 assertion passes.",
     "The previous migrationSpec multi-column index failure was a Wheels metadata-shape assumption, fixed in wheels-dev/wheels#3697, not the closed RustCFML#377. Both previously baselined Linux StorageSpec errors pass on this v0.691.0 run and are removed.",
     "SystemUtilSpec retains missing-property default/error assertions on every engine; java.version is required only when EngineCapabilities confirms real JVM class loading. RustCFML is JVM-free, so a null Java-version placeholder is not an engine defect."