diff --git a/data/src/main/kotlin/com/bitwarden/data/manager/flightrecorder/FlightRecorderWriterImpl.kt b/data/src/main/kotlin/com/bitwarden/data/manager/flightrecorder/FlightRecorderWriterImpl.kt
index 9ba25ecab57..c105d84030b 100644
--- a/data/src/main/kotlin/com/bitwarden/data/manager/flightrecorder/FlightRecorderWriterImpl.kt
+++ b/data/src/main/kotlin/com/bitwarden/data/manager/flightrecorder/FlightRecorderWriterImpl.kt
@@ -10,6 +10,7 @@ import com.bitwarden.core.data.util.toFormattedPattern
 import com.bitwarden.data.datasource.disk.model.FlightRecorderDataSet
 import com.bitwarden.data.manager.file.FileManager
 import com.bitwarden.data.repository.ServerConfigRepository
+import com.bitwarden.network.util.redactHostnamesInMessage
 import kotlinx.coroutines.withContext
 import timber.log.Timber
 import java.io.BufferedWriter
@@ -17,6 +18,7 @@ import java.io.File
 import java.io.FileWriter
 import java.io.PrintWriter
 import java.io.StringWriter
+import java.net.URI
 import java.time.Clock
 import java.time.Instant
 import kotlin.time.Duration.Companion.milliseconds
@@ -34,6 +36,19 @@ internal class FlightRecorderWriterImpl(
     private val buildInfoManager: BuildInfoManager,
     private val serverConfigRepository: ServerConfigRepository,
 ) : FlightRecorderWriter {
+    private val configuredHosts: Set<String>
+        get() {
+            val environment = serverConfigRepository.serverConfigStateFlow.value
+                ?.serverData?.environment ?: return emptySet()
+            return listOfNotNull(
+                environment.vaultUrl,
+                environment.apiUrl,
+                environment.identityUrl,
+                environment.notificationsUrl,
+                environment.ssoUrl,
+            ).mapNotNull { runCatching { URI(it).host }.getOrNull() }.toSet()
+        }
+
     override suspend fun deleteLog(data: FlightRecorderDataSet.FlightRecorderData) {
         fileManager.delete(File(File(fileManager.logsDirectory), data.fileName))
     }
@@ -98,6 +113,7 @@ internal class FlightRecorderWriterImpl(
         val formattedTime = clock
             .instant()
             .toFormattedPattern(pattern = LOG_TIME_PATTERN, clock = clock)
+        val hosts = configuredHosts
         withContext(context = dispatcherManager.io) {
             runCatching {
                 BufferedWriter(FileWriter(logFile, true)).use { bw ->
@@ -109,10 +125,10 @@ internal class FlightRecorderWriterImpl(
                         bw.append(it)
                     }
                     bw.append(" – ")
-                    bw.append(message)
+                    bw.append(message.redactHostnamesInMessage(hosts))
                     throwable?.let {
                         bw.append(" – ")
-                        bw.append(it.getStackTraceString())
+                        bw.append(it.getStackTraceString().redactHostnamesInMessage(hosts))
                     }
                     bw.newLine()
                 }
diff --git a/network/src/main/kotlin/com/bitwarden/network/core/NetworkResultCall.kt b/network/src/main/kotlin/com/bitwarden/network/core/NetworkResultCall.kt
index 9e6d7c0f0d3..2ec1350b4ca 100644
--- a/network/src/main/kotlin/com/bitwarden/network/core/NetworkResultCall.kt
+++ b/network/src/main/kotlin/com/bitwarden/network/core/NetworkResultCall.kt
@@ -16,6 +16,8 @@ import java.lang.reflect.Type
  */
 private const val NO_CONTENT_RESPONSE_CODE: Int = 204
 
+private val UNKNOWN_HOST_REGEX = Regex("""Unable to resolve host "([^"]+)"""")
+
 /**
  * A [Call] for wrapping a network request into a [NetworkResult].
  */
@@ -26,7 +28,8 @@ internal class NetworkResultCall<T>(
 ) : Call<NetworkResult<T>> {
     override fun cancel(): Unit = backingCall.cancel()
 
-    override fun clone(): Call<NetworkResult<T>> = NetworkResultCall(backingCall, successType)
+    override fun clone(): Call<NetworkResult<T>> =
+        NetworkResultCall(backingCall, successType)
 
     override fun enqueue(callback: Callback<NetworkResult<T>>): Unit = backingCall.enqueue(
         object : Callback<T> {
@@ -67,8 +70,16 @@ internal class NetworkResultCall<T>(
     fun executeForResult(): NetworkResult<T> = requireNotNull(execute().body())
 
     private fun Throwable.toFailure(): NetworkResult<T> {
-        // We rebuild the URL without query params, we do not want to log those
-        val url = backingCall.request().url.toUrl().run { "$protocol://$authority$path" }
+        val originalUrl = backingCall.request().url.toUrl()
+
+        val extractedHost = message?.let { UNKNOWN_HOST_REGEX.find(it)?.groupValues?.getOrNull(1) }
+
+        val url = if (extractedHost != null) {
+            "${originalUrl.protocol}://$extractedHost${originalUrl.path}"
+        } else {
+            "${originalUrl.protocol}://${originalUrl.authority}${originalUrl.path}"
+        }
+
         Timber.w(this, "Network Error: $url")
         return NetworkResult.Failure(this)
     }
diff --git a/network/src/main/kotlin/com/bitwarden/network/core/NetworkResultCallAdapter.kt b/network/src/main/kotlin/com/bitwarden/network/core/NetworkResultCallAdapter.kt
index 2cbd9b41e5b..590bdec3ff0 100644
--- a/network/src/main/kotlin/com/bitwarden/network/core/NetworkResultCallAdapter.kt
+++ b/network/src/main/kotlin/com/bitwarden/network/core/NetworkResultCallAdapter.kt
@@ -13,5 +13,6 @@ internal class NetworkResultCallAdapter<T>(
 ) : CallAdapter<T, Call<NetworkResult<T>>> {
 
     override fun responseType(): Type = successType
-    override fun adapt(call: Call<T>): Call<NetworkResult<T>> = NetworkResultCall(call, successType)
+    override fun adapt(call: Call<T>): Call<NetworkResult<T>> =
+        NetworkResultCall(call, successType)
 }
diff --git a/network/src/main/kotlin/com/bitwarden/network/util/HostnameRedactionUtil.kt b/network/src/main/kotlin/com/bitwarden/network/util/HostnameRedactionUtil.kt
new file mode 100644
index 00000000000..807ab54fccb
--- /dev/null
+++ b/network/src/main/kotlin/com/bitwarden/network/util/HostnameRedactionUtil.kt
@@ -0,0 +1,27 @@
+package com.bitwarden.network.util
+
+/**
+ * List of official Bitwarden cloud hostnames that are safe to log.
+ */
+private val BITWARDEN_HOSTS = listOf("bitwarden.com", "bitwarden.eu", "bitwarden.pw")
+
+/**
+ * Redacts hostnames in a log message by replacing bare hostnames with [REDACTED_SELF_HOST].
+ *
+ * Only redacts hostnames that match [configuredHosts] AND are not official Bitwarden domains.
+ * Preserves all Bitwarden domains (including QA/dev environments).
+ *
+ * @param configuredHosts Set of hostnames to redact
+ * @return Message with hostnames redacted as [REDACTED_SELF_HOST]
+ */
+fun String.redactHostnamesInMessage(configuredHosts: Set<String>): String =
+    configuredHosts.fold(this) { result, hostname ->
+        val escapedHostname = Regex.escape(hostname)
+        val bareHostnamePattern = Regex("""\b$escapedHostname\b""")
+        bareHostnamePattern.replace(result) { hostname.redactIfSelfHosted() }
+    }
+
+private fun String.redactIfSelfHosted(): String {
+    val isBitwardenHost = BITWARDEN_HOSTS.any { this.endsWith(it) }
+    return if (isBitwardenHost) this else "[REDACTED_SELF_HOST]"
+}
diff --git a/network/src/test/kotlin/com/bitwarden/network/util/HostnameRedactionUtilTest.kt b/network/src/test/kotlin/com/bitwarden/network/util/HostnameRedactionUtilTest.kt
new file mode 100644
index 00000000000..1d98e7aa1b8
--- /dev/null
+++ b/network/src/test/kotlin/com/bitwarden/network/util/HostnameRedactionUtilTest.kt
@@ -0,0 +1,146 @@
+package com.bitwarden.network.util
+
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Test
+
+class HostnameRedactionUtilTest {
+    @Test
+    fun `redactHostnamesInMessage redacts configured self-hosted URLs`() {
+        val message = "--> GET https://vault.example.com/api/sync HTTP/1.1"
+        val configuredHosts = setOf("vault.example.com")
+
+        val result = message.redactHostnamesInMessage(configuredHosts)
+
+        assertEquals("--> GET https://[REDACTED_SELF_HOST]/api/sync HTTP/1.1", result)
+    }
+
+    @Test
+    fun `redactHostnamesInMessage preserves non-configured URLs`() {
+        val message = "--> GET https://vault.example.com/api/sync HTTP/1.1"
+        val configuredHosts = setOf("api.bitwarden.com") // Different host
+
+        val result = message.redactHostnamesInMessage(configuredHosts)
+
+        assertEquals(message, result) // Unchanged - not in configured hosts
+    }
+
+    @Test
+    fun `redactHostnamesInMessage preserves Bitwarden URLs even if configured`() {
+        val message = "--> GET https://vault.bitwarden.com/api/sync HTTP/1.1"
+        val configuredHosts = setOf("vault.bitwarden.com")
+
+        val result = message.redactHostnamesInMessage(configuredHosts)
+
+        assertEquals(message, result) // Unchanged - Bitwarden domain preserved
+    }
+
+    @Test
+    fun `redactHostnamesInMessage redacts quoted hostnames in error messages`() {
+        val message = """Unable to resolve host "vault.example.com": No address"""
+        val configuredHosts = setOf("vault.example.com")
+
+        val result = message.redactHostnamesInMessage(configuredHosts)
+
+        assertEquals("""Unable to resolve host "[REDACTED_SELF_HOST]": No address""", result)
+    }
+
+    @Test
+    fun `redactHostnamesInMessage handles multiple URLs in one message`() {
+        val message = "Redirect from https://old.corp.com to https://new.corp.com"
+        val configuredHosts = setOf("old.corp.com", "new.corp.com")
+
+        val result = message.redactHostnamesInMessage(configuredHosts)
+
+        assertEquals(
+            "Redirect from https://[REDACTED_SELF_HOST] to https://[REDACTED_SELF_HOST]",
+            result,
+        )
+    }
+
+    @Test
+    fun `redactHostnamesInMessage handles empty configured hosts`() {
+        val message = "--> GET https://vault.example.com/api HTTP/1.1"
+        val configuredHosts = emptySet<String>()
+
+        val result = message.redactHostnamesInMessage(configuredHosts)
+
+        assertEquals(message, result) // Unchanged - no hosts to redact
+    }
+
+    @Test
+    fun `redactHostnamesInMessage handles NetworkCookieManagerImpl getCookies pattern`() {
+        val message = "2026-03-09 12:43:29:857 – DEBUG – NetworkCookieManagerImpl – " +
+            "getCookies(vault.example.com): resolved=vault.example.com, count=0"
+        val configuredHosts = setOf("vault.example.com")
+
+        val result = message.redactHostnamesInMessage(configuredHosts)
+
+        assertEquals(
+            "2026-03-09 12:43:29:857 – DEBUG – NetworkCookieManagerImpl – " +
+                "getCookies([REDACTED_SELF_HOST]): resolved=[REDACTED_SELF_HOST], count=0",
+            result,
+        )
+    }
+
+    @Test
+    fun `redactHostnamesInMessage preserves Bitwarden domains in NetworkCookieManagerImpl logs`() {
+        val message = "2026-03-09 12:43:29:857 – DEBUG – NetworkCookieManagerImpl – " +
+            "getCookies(vault.example.com): resolved=vault.qa.bitwarden.pw, count=0"
+        val configuredHosts = setOf("vault.example.com", "vault.qa.bitwarden.pw")
+
+        val result = message.redactHostnamesInMessage(configuredHosts)
+
+        assertEquals(
+            "2026-03-09 12:43:29:857 – DEBUG – NetworkCookieManagerImpl – " +
+                "getCookies([REDACTED_SELF_HOST]): resolved=vault.qa.bitwarden.pw, count=0",
+            result,
+        )
+    }
+
+    @Test
+    fun `redactHostnamesInMessage handles UnknownHostException error message`() {
+        val message = "DEBUG – BitwardenNetworkClient – <-- HTTP FAILED: " +
+            "java.net.UnknownHostException: Unable to resolve host " +
+            "\"vault.example.com\": No address associated with hostname."
+        val configuredHosts = setOf("vault.example.com")
+
+        val result = message.redactHostnamesInMessage(configuredHosts)
+
+        assertEquals(
+            "DEBUG – BitwardenNetworkClient – <-- HTTP FAILED: " +
+                "java.net.UnknownHostException: Unable to resolve host " +
+                "\"[REDACTED_SELF_HOST]\": No address associated with hostname.",
+            result,
+        )
+    }
+
+    @Test
+    fun `redactHostnamesInMessage handles needsBootstrap pattern`() {
+        val message = "2026-03-09 12:43:29:851 – DEBUG – NetworkCookieManagerImpl – " +
+            "needsBootstrap(vault.example.com): false (cookieDomain=null)"
+        val configuredHosts = setOf("vault.example.com")
+
+        val result = message.redactHostnamesInMessage(configuredHosts)
+
+        assertEquals(
+            "2026-03-09 12:43:29:851 – DEBUG – NetworkCookieManagerImpl – " +
+                "needsBootstrap([REDACTED_SELF_HOST]): false (cookieDomain=null)",
+            result,
+        )
+    }
+
+    @Test
+    fun `redactHostnamesInMessage handles resolveHostname pattern`() {
+        val message = "2026-03-09 12:43:29:855 – DEBUG – NetworkCookieManagerImpl – " +
+            "resolveHostname(vault.example.com): no stored config found, using original"
+        val configuredHosts = setOf("vault.example.com")
+
+        val result = message.redactHostnamesInMessage(configuredHosts)
+
+        assertEquals(
+            "2026-03-09 12:43:29:855 – DEBUG – NetworkCookieManagerImpl – " +
+                "resolveHostname([REDACTED_SELF_HOST]): no stored config found, using original",
+            result,
+        )
+    }
+}