diff --git a/.changeset/sixty-cycles-scream.md b/.changeset/sixty-cycles-scream.md
new file mode 100644
index 00000000000..1c848d94b36
--- /dev/null
+++ b/.changeset/sixty-cycles-scream.md
@@ -0,0 +1,10 @@
+---
+'@firebase/auth-compat': patch
+'@firebase/firestore': patch
+'@firebase/functions': patch
+'@firebase/storage': patch
+'@firebase/auth': patch
+'firebase': patch
+---
+
+Update undici dependency to 6.19.7 due to a memory leak in older versions.
diff --git a/integration/messaging/package.json b/integration/messaging/package.json
index 07e7e21bd9a..bd32daa7f21 100644
--- a/integration/messaging/package.json
+++ b/integration/messaging/package.json
@@ -15,7 +15,7 @@
     "express": "4.19.2",
     "geckodriver": "2.0.4",
     "mocha": "9.2.2",
-    "undici": "5.28.4",
+    "undici": "6.19.7",
     "selenium-assistant": "6.1.1"
   }
 }
diff --git a/package.json b/package.json
index 5918cf1b3fc..32d8e78eeb9 100644
--- a/package.json
+++ b/package.json
@@ -156,7 +156,7 @@
     "tslint": "6.1.3",
     "typedoc": "0.16.11",
     "typescript": "4.7.4",
-    "undici": "5.28.4",
+    "undici": "6.19.7",
     "watch": "1.0.2",
     "webpack": "5.76.0",
     "yargs": "17.7.2"
diff --git a/packages/auth-compat/package.json b/packages/auth-compat/package.json
index b8de7c494da..770b0438d63 100644
--- a/packages/auth-compat/package.json
+++ b/packages/auth-compat/package.json
@@ -55,7 +55,7 @@
     "@firebase/auth-types": "0.12.2",
     "@firebase/component": "0.6.8",
     "@firebase/util": "1.9.7",
-    "undici": "5.28.4",
+    "undici": "6.19.7",
     "tslib": "^2.1.0"
   },
   "license": "Apache-2.0",
diff --git a/packages/auth/package.json b/packages/auth/package.json
index 5fc03c9c57f..add928154b5 100644
--- a/packages/auth/package.json
+++ b/packages/auth/package.json
@@ -130,7 +130,7 @@
     "@firebase/component": "0.6.8",
     "@firebase/logger": "0.4.2",
     "@firebase/util": "1.9.7",
-    "undici": "5.28.4",
+    "undici": "6.19.7",
     "tslib": "^2.1.0"
   },
   "license": "Apache-2.0",
diff --git a/packages/firestore/package.json b/packages/firestore/package.json
index f2f18451fb5..5547161658b 100644
--- a/packages/firestore/package.json
+++ b/packages/firestore/package.json
@@ -103,7 +103,7 @@
     "@firebase/webchannel-wrapper": "1.0.1",
     "@grpc/grpc-js": "~1.9.0",
     "@grpc/proto-loader": "^0.7.8",
-    "undici": "5.28.4",
+    "undici": "6.19.7",
     "tslib": "^2.1.0"
   },
   "peerDependencies": {
diff --git a/packages/functions/package.json b/packages/functions/package.json
index 3f0aea9cac7..f69d514b376 100644
--- a/packages/functions/package.json
+++ b/packages/functions/package.json
@@ -72,7 +72,7 @@
     "@firebase/auth-interop-types": "0.2.3",
     "@firebase/app-check-interop-types": "0.3.2",
     "@firebase/util": "1.9.7",
-    "undici": "5.28.4",
+    "undici": "6.19.7",
     "tslib": "^2.1.0"
   },
   "nyc": {
diff --git a/packages/storage/package.json b/packages/storage/package.json
index 23768508baf..f609e2b5f85 100644
--- a/packages/storage/package.json
+++ b/packages/storage/package.json
@@ -49,7 +49,7 @@
   "dependencies": {
     "@firebase/util": "1.9.7",
     "@firebase/component": "0.6.8",
-    "undici": "5.28.4",
+    "undici": "6.19.7",
     "tslib": "^2.1.0"
   },
   "peerDependencies": {
diff --git a/repo-scripts/changelog-generator/package.json b/repo-scripts/changelog-generator/package.json
index e04bb6f2ecf..f4afc131d1f 100644
--- a/repo-scripts/changelog-generator/package.json
+++ b/repo-scripts/changelog-generator/package.json
@@ -20,7 +20,7 @@
     "@changesets/types": "3.3.0",
     "@changesets/get-github-info": "0.5.2",
     "@types/node": "20.8.10",
-    "undici": "5.28.4"
+    "undici": "6.19.7"
   },
   "license": "Apache-2.0",
   "devDependencies": {
diff --git a/yarn.lock b/yarn.lock
index 49bbd54a546..477e784871e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1639,11 +1639,6 @@
   resolved "https://registry.npmjs.org/@eslint/js/-/js-8.56.0.tgz#ef20350fec605a7f7035a01764731b2de0f3782b"
   integrity sha512-gMsVel9D7f2HLkBma9VbtzZRehRogVRfbr++f06nL2vnCGCNlzOD+/MUov/F4p8myyAHspEhVobgjpX64q5m6A==
 
-"@fastify/busboy@^2.0.0":
-  version "2.0.0"
-  resolved "https://registry.npmjs.org/@fastify/busboy/-/busboy-2.0.0.tgz#f22824caff3ae506b18207bad4126dbc6ccdb6b8"
-  integrity sha512-JUFJad5lv7jxj926GPgymrWQxxjPYuJNiNjNMzqT+HiuP6Vl3dk5xzG+8sTX96np0ZAluvaMzPsjhHZ5rNuNQQ==
-
 "@gar/promisify@^1.0.1":
   version "1.1.2"
   resolved "https://registry.npmjs.org/@gar/promisify/-/promisify-1.1.2.tgz"
@@ -17393,12 +17388,10 @@ undici-types@~5.26.4:
   resolved "https://registry.npmjs.org/undici-types/-/undici-types-5.26.5.tgz#bcd539893d00b56e964fd2657a4866b221a65617"
   integrity sha512-JlCMO+ehdEIKqlFxk6IfVoAUVmgz7cU7zD/h9XZ0qzeosSHmUJVOzSQvvYSYWXkFXC+IfLKSIffhv0sVZup6pA==
 
-undici@5.28.4:
-  version "5.28.4"
-  resolved "https://registry.npmjs.org/undici/-/undici-5.28.4.tgz#6b280408edb6a1a604a9b20340f45b422e373068"
-  integrity sha512-72RFADWFqKmUb2hmmvNODKL3p9hcB6Gt2DOQMis1SEBaV6a4MH8soBvzg+95CYhCKPFedut2JY9bMfrDl9D23g==
-  dependencies:
-    "@fastify/busboy" "^2.0.0"
+undici@6.19.7:
+  version "6.19.7"
+  resolved "https://registry.npmjs.org/undici/-/undici-6.19.7.tgz#7d4cf26dc689838aa8b6753a3c5c4288fc1e0216"
+  integrity sha512-HR3W/bMGPSr90i8AAp2C4DM3wChFdJPLrWYpIS++LxS8K+W535qftjt+4MyjNYHeWabMj1nvtmLIi7l++iq91A==
 
 unicode-canonical-property-names-ecmascript@^2.0.0:
   version "2.0.0"