diff --git a/komga/src/main/kotlin/org/gotson/komga/domain/service/BookImporter.kt b/komga/src/main/kotlin/org/gotson/komga/domain/service/BookImporter.kt
index 420302d2..d2536d19 100644
--- a/komga/src/main/kotlin/org/gotson/komga/domain/service/BookImporter.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/domain/service/BookImporter.kt
@@ -4,8 +4,10 @@ import mu.KotlinLogging
 import org.gotson.komga.application.tasks.TaskReceiver
 import org.gotson.komga.domain.model.CopyMode
 import org.gotson.komga.domain.model.Media
+import org.gotson.komga.domain.model.PathContainedInPath
 import org.gotson.komga.domain.model.Series
 import org.gotson.komga.domain.persistence.BookRepository
+import org.gotson.komga.domain.persistence.LibraryRepository
 import org.gotson.komga.domain.persistence.MediaRepository
 import org.gotson.komga.domain.persistence.ReadListRepository
 import org.gotson.komga.domain.persistence.ReadProgressRepository
@@ -37,11 +39,16 @@ class BookImporter(
   private val readProgressRepository: ReadProgressRepository,
   private val readListRepository: ReadListRepository,
   private val taskReceiver: TaskReceiver,
+  private val libraryRepository: LibraryRepository,
 ) {
 
   fun importBook(sourceFile: Path, series: Series, copyMode: CopyMode, destinationName: String? = null, upgradeBookId: String? = null) {
     if (sourceFile.notExists()) throw FileNotFoundException("File not found: $sourceFile")
 
+    libraryRepository.findAll().forEach { library ->
+      if (sourceFile.startsWith(library.path())) throw PathContainedInPath("Cannot import file that is part of an existing library")
+    }
+
     val destFile = series.path().resolve(
       if (destinationName != null) Paths.get("$destinationName.${sourceFile.extension}").fileName.toString()
       else sourceFile.fileName.toString()
diff --git a/komga/src/test/kotlin/org/gotson/komga/domain/model/Utils.kt b/komga/src/test/kotlin/org/gotson/komga/domain/model/Utils.kt
index c91d2eab..9f0bec77 100644
--- a/komga/src/test/kotlin/org/gotson/komga/domain/model/Utils.kt
+++ b/komga/src/test/kotlin/org/gotson/komga/domain/model/Utils.kt
@@ -25,8 +25,12 @@ fun makeSeries(name: String, libraryId: String = "", url: URL? = null): Series {
   )
 }
 
-fun makeLibrary(name: String = "default", url: String = "file:/$name", id: String = TsidCreator.getTsid256().toString()): Library {
-  return Library(name, URL(url), id = id)
+fun makeLibrary(name: String = "default", path: String = "file:/$name", id: String = TsidCreator.getTsid256().toString(), url: URL? = null): Library {
+  return Library(
+    name = name,
+    root = url ?: URL(path),
+    id = id
+  )
 }
 
 fun makeBookPage(name: String) =
diff --git a/komga/src/test/kotlin/org/gotson/komga/domain/service/BookImporterTest.kt b/komga/src/test/kotlin/org/gotson/komga/domain/service/BookImporterTest.kt
index c6c50264..5bf44bfd 100644
--- a/komga/src/test/kotlin/org/gotson/komga/domain/service/BookImporterTest.kt
+++ b/komga/src/test/kotlin/org/gotson/komga/domain/service/BookImporterTest.kt
@@ -15,6 +15,7 @@ import org.gotson.komga.domain.model.BookPage
 import org.gotson.komga.domain.model.CopyMode
 import org.gotson.komga.domain.model.KomgaUser
 import org.gotson.komga.domain.model.Media
+import org.gotson.komga.domain.model.PathContainedInPath
 import org.gotson.komga.domain.model.ReadList
 import org.gotson.komga.domain.model.makeBook
 import org.gotson.komga.domain.model.makeLibrary
@@ -148,6 +149,31 @@ class BookImporterTest(
     }
   }
 
+  @Test
+  fun `given source file parf of a Komga library when importing then exception is thrown`() {
+    Jimfs.newFileSystem(Configuration.unix()).use { fs ->
+      // given
+      val sourceDir = fs.getPath("/source").createDirectory()
+      val sourceFile = sourceDir.resolve("source.cbz").createFile()
+      val destDir = fs.getPath("/dest").createDirectory()
+
+      val series = makeSeries("dest").copy(url = destDir.toUri().toURL())
+
+      val libraryJimfs = makeLibrary("jimfs", url = sourceDir.toUri().toURL())
+      libraryRepository.insert(libraryJimfs)
+
+      // when
+      val thrown = Assertions.catchThrowable {
+        bookImporter.importBook(sourceFile, series, CopyMode.COPY)
+      }
+
+      // then
+      assertThat(thrown).isInstanceOf(PathContainedInPath::class.java)
+
+      libraryRepository.delete(libraryJimfs.id)
+    }
+  }
+
   @Test
   fun `given book when importing then book is imported and series is sorted`() {
     Jimfs.newFileSystem(Configuration.unix()).use { fs ->
diff --git a/komga/src/test/kotlin/org/gotson/komga/interfaces/rest/LibraryControllerTest.kt b/komga/src/test/kotlin/org/gotson/komga/interfaces/rest/LibraryControllerTest.kt
index a8ae74f6..76cab10a 100644
--- a/komga/src/test/kotlin/org/gotson/komga/interfaces/rest/LibraryControllerTest.kt
+++ b/komga/src/test/kotlin/org/gotson/komga/interfaces/rest/LibraryControllerTest.kt
@@ -31,7 +31,7 @@ class LibraryControllerTest(
 
   private val route = "/api/v1/libraries"
 
-  private val library = makeLibrary(url = "file:/library1", id = "1")
+  private val library = makeLibrary(path = "file:/library1", id = "1")
 
   @BeforeAll
   fun `setup library`() {