FirebaseFunctionsException: Unauthenticated after upgrading to Firebase BoM v33.11.0

[mattiaferigutti]

After updating from Firebase BoM v33.10.0 to v33.11.0, I started consistently receiving this exception:

com.google.firebase.functions.FirebaseFunctionsException: Unauthenticated

This occurs when invoking a callable function (createAuthUser) via FirebaseFunctions.getHttpsCallable().call() in my Android app. The code and behavior were working fine in BoM v33.10.0 (Functions SDK 21.1.1).

---

Environment:

• Firebase BoM: 33.11.0
• Protobuf Gradle Plugin: 0.9.4
• Protobuf Lite: 4.26.1
• Android SDK: Target 35
• Kotlin: 2.0.0

---

Code Sample:

override suspend fun signUp(uid: String, email: String, password: String): Result<Unit> {
  val request = hashMapOf("uid" to uid, "email" to email, "password" to password)

  return try {
    FirebaseManager.getFunctions(context)
      .getHttpsCallable("createAuthUser")
      .call(request)
      .await()
    Result.success(Unit)
  } catch (e: FirebaseFunctionsException) {
    Result.failure(e)
  }
}

• createAuthUser is public and can be accessed by anyone on the internet, which makes the Unauthenticated exception especially strange.

---

What I've Tried:

• Reverted back to BoM 33.10.0 and the issue disappears.
• Confirmed there were no changes to backend Cloud Function or auth logic in the Android app.

---

Behavior:

Throws FirebaseFunctionsException: Unauthenticated immediately after invoking the function.

[google-oss-bot]

I couldn't figure out how to label this issue, so I've labeled it for a human to triage. Hang tight.

[lehcar09]

Hi @mattiaferigutti, thank you for reaching out. I tried reproducing the issue, but I did not encounter the error on BOM 33.11.0 on public function. Have you tried the troubleshooting steps shared here?

[google-oss-bot]

Hey @mattiaferigutti. We need more information to resolve this issue but there hasn't been an update in 5 weekdays. I'm marking the issue as stale and if there are no new updates in the next 5 days I will close it automatically.

If you have more information that will help us get to the bottom of this, just add a comment!

[svenjacobs]

We're also seeing occasional "Unauthenticated" exceptions although the function that we call is set to "allow unauthenticated invocations". I double checked in Google Cloud Console. What other reasons could be there for this exception to occur?

[google-oss-bot]

Hey @mattiaferigutti. We need more information to resolve this issue but there hasn't been an update in 5 weekdays. I'm marking the issue as stale and if there are no new updates in the next 5 days I will close it automatically.

If you have more information that will help us get to the bottom of this, just add a comment!

[google-oss-bot]

Since there haven't been any recent updates here, I am going to close this issue.

@mattiaferigutti if you're still experiencing this problem and want to continue the discussion just leave a comment here and we are happy to re-open this.