diff --git a/CHANGELOG.md b/CHANGELOG.md
index a78b933a47..d4bc6b5dc9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,8 @@
 ### Fixes
 
 - Stop the Hermes sampling profiler on React instance teardown to prevent `pthread_kill` SIGABRT when the JS thread is torn down with profiling active ([#6035](https://github.com/getsentry/sentry-react-native/pull/6035))
+- Restrict `getDataFromUri` on iOS to the app's temporary, caches, and documents directories ([#6045](https://github.com/getsentry/sentry-react-native/pull/6045))
+- Restrict `getDataFromUri` on Android to known media and document content providers and app-internal file locations ([#6045](https://github.com/getsentry/sentry-react-native/pull/6045))
 
 ### Dependencies
 
diff --git a/packages/core/android/build.gradle b/packages/core/android/build.gradle
index 8923cd0730..871096f0f4 100644
--- a/packages/core/android/build.gradle
+++ b/packages/core/android/build.gradle
@@ -57,4 +57,7 @@ dependencies {
     implementation 'com.facebook.react:react-native:+'
     api 'io.sentry:sentry-android:8.40.0'
     debugImplementation 'io.sentry:sentry-spotlight:8.40.0'
+
+    testImplementation 'junit:junit:4.13.2'
+    testImplementation 'org.mockito:mockito-core:5.12.0'
 }
diff --git a/packages/core/android/src/main/java/io/sentry/react/RNSentryModuleImpl.java b/packages/core/android/src/main/java/io/sentry/react/RNSentryModuleImpl.java
index 93eb2cea4c..3f3e7ebbe3 100644
--- a/packages/core/android/src/main/java/io/sentry/react/RNSentryModuleImpl.java
+++ b/packages/core/android/src/main/java/io/sentry/react/RNSentryModuleImpl.java
@@ -74,6 +74,7 @@
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Properties;
 import java.util.concurrent.CountDownLatch;
@@ -1083,10 +1084,26 @@ public String fetchNativePackageName() {
   }
 
   public void getDataFromUri(String uri, Promise promise) {
+    final Uri parsedUri;
+    try {
+      parsedUri = Uri.parse(uri);
+    } catch (Exception e) {
+      String msg = "Invalid uri: " + uri;
+      logger.log(SentryLevel.ERROR, msg);
+      promise.reject(new Exception(msg));
+      return;
+    }
+
+    if (!isAllowedUri(parsedUri, getReactApplicationContext())) {
+      String msg = "Unsupported uri scheme or location: " + uri;
+      logger.log(SentryLevel.ERROR, msg);
+      promise.reject(new Exception(msg));
+      return;
+    }
+
     try {
-      Uri contentUri = Uri.parse(uri);
       try (InputStream is =
-          getReactApplicationContext().getContentResolver().openInputStream(contentUri)) {
+          getReactApplicationContext().getContentResolver().openInputStream(parsedUri)) {
         if (is == null) {
           String msg = "File not found for uri: " + uri;
           logger.log(SentryLevel.ERROR, msg);
@@ -1115,6 +1132,77 @@ public void getDataFromUri(String uri, Promise promise) {
     }
   }
 
+  @VisibleForTesting
+  static boolean isAllowedUri(@NotNull Uri uri, @Nullable Context ctx) {
+    final String scheme = uri.getScheme();
+    if (scheme == null) {
+      return false;
+    }
+    final String lowerScheme = scheme.toLowerCase(Locale.ROOT);
+    if ("content".equals(lowerScheme)) {
+      return isAllowedContentAuthority(uri.getAuthority(), ctx);
+    }
+    if ("file".equals(lowerScheme)) {
+      return isPathUnderAppDirs(uri.getPath(), ctx);
+    }
+    return false;
+  }
+
+  @VisibleForTesting
+  static boolean isAllowedContentAuthority(@Nullable String authority, @Nullable Context ctx) {
+    if (authority == null) {
+      return false;
+    }
+    final String lower = authority.toLowerCase(Locale.ROOT);
+    if ("media".equals(lower)) {
+      return true;
+    }
+    if ("com.android.providers.media.documents".equals(lower)
+        || "com.android.externalstorage.documents".equals(lower)
+        || "com.android.providers.downloads.documents".equals(lower)) {
+      return true;
+    }
+    if (ctx != null) {
+      final String pkg = ctx.getPackageName();
+      if (pkg != null && lower.equals(pkg.toLowerCase(Locale.ROOT) + ".fileprovider")) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  @VisibleForTesting
+  static boolean isPathUnderAppDirs(@Nullable String rawPath, @Nullable Context ctx) {
+    if (rawPath == null || rawPath.isEmpty()) {
+      return false;
+    }
+    if (ctx == null) {
+      return false;
+    }
+    try {
+      final String target = new File(rawPath).getCanonicalPath();
+      final File[] roots =
+          new File[] {
+            ctx.getFilesDir(),
+            ctx.getCacheDir(),
+            ctx.getExternalFilesDir(null),
+            ctx.getExternalCacheDir()
+          };
+      for (File root : roots) {
+        if (root == null) {
+          continue;
+        }
+        final String rootPath = root.getCanonicalPath();
+        if (target.equals(rootPath) || target.startsWith(rootPath + File.separator)) {
+          return true;
+        }
+      }
+    } catch (IOException e) {
+      return false;
+    }
+    return false;
+  }
+
   public void encodeToBase64(ReadableArray array, Promise promise) {
     byte[] bytes = new byte[array.size()];
     for (int i = 0; i < array.size(); i++) {
diff --git a/packages/core/android/src/test/java/io/sentry/react/RNSentryUriValidationTest.java b/packages/core/android/src/test/java/io/sentry/react/RNSentryUriValidationTest.java
new file mode 100644
index 0000000000..5a3b09c345
--- /dev/null
+++ b/packages/core/android/src/test/java/io/sentry/react/RNSentryUriValidationTest.java
@@ -0,0 +1,163 @@
+package io.sentry.react;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.net.Uri;
+import java.io.File;
+import java.io.IOException;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+
+public class RNSentryUriValidationTest {
+
+  @Rule public TemporaryFolder tempFolder = new TemporaryFolder();
+
+  private Context ctx;
+  private File filesDir;
+  private File cacheDir;
+
+  @Before
+  public void setUp() throws IOException {
+    filesDir = tempFolder.newFolder("files");
+    cacheDir = tempFolder.newFolder("cache");
+
+    ctx = mock(Context.class);
+    when(ctx.getFilesDir()).thenReturn(filesDir);
+    when(ctx.getCacheDir()).thenReturn(cacheDir);
+    when(ctx.getExternalFilesDir(null)).thenReturn(null);
+    when(ctx.getExternalCacheDir()).thenReturn(null);
+    when(ctx.getPackageName()).thenReturn("com.example.app");
+  }
+
+  private static Uri mockUri(String scheme, String authority, String path) {
+    Uri u = mock(Uri.class);
+    when(u.getScheme()).thenReturn(scheme);
+    when(u.getAuthority()).thenReturn(authority);
+    when(u.getPath()).thenReturn(path);
+    return u;
+  }
+
+  @Test
+  public void rejectsNullScheme() {
+    assertFalse(RNSentryModuleImpl.isAllowedUri(mockUri(null, null, null), ctx));
+  }
+
+  @Test
+  public void rejectsUnknownScheme() {
+    assertFalse(RNSentryModuleImpl.isAllowedUri(mockUri("http", "example.com", "/foo"), ctx));
+  }
+
+  @Test
+  public void rejectsAndroidResourceScheme() {
+    assertFalse(RNSentryModuleImpl.isAllowedUri(mockUri("android.resource", "pkg", "/1"), ctx));
+  }
+
+  @Test
+  public void allowsContentMediaAuthority() {
+    assertTrue(
+        RNSentryModuleImpl.isAllowedUri(
+            mockUri("content", "media", "/external/images/media/42"), ctx));
+  }
+
+  @Test
+  public void allowsContentSchemeCaseInsensitive() {
+    assertTrue(RNSentryModuleImpl.isAllowedUri(mockUri("CONTENT", "Media", "/anything"), ctx));
+  }
+
+  @Test
+  public void allowsSafDocumentsAuthorities() {
+    assertTrue(
+        RNSentryModuleImpl.isAllowedUri(
+            mockUri("content", "com.android.providers.media.documents", "/doc"), ctx));
+    assertTrue(
+        RNSentryModuleImpl.isAllowedUri(
+            mockUri("content", "com.android.externalstorage.documents", "/doc"), ctx));
+    assertTrue(
+        RNSentryModuleImpl.isAllowedUri(
+            mockUri("content", "com.android.providers.downloads.documents", "/doc"), ctx));
+  }
+
+  @Test
+  public void allowsAppOwnFileProviderAuthority() {
+    assertTrue(
+        RNSentryModuleImpl.isAllowedUri(
+            mockUri("content", "com.example.app.fileprovider", "/shared"), ctx));
+  }
+
+  @Test
+  public void rejectsForeignContentAuthority() {
+    assertFalse(
+        RNSentryModuleImpl.isAllowedUri(
+            mockUri("content", "com.attacker.evil.provider", "/evil"), ctx));
+  }
+
+  @Test
+  public void rejectsNullAuthorityOnContentScheme() {
+    assertFalse(RNSentryModuleImpl.isAllowedUri(mockUri("content", null, "/x"), ctx));
+  }
+
+  @Test
+  public void rejectsFileSchemeWithNullContext() {
+    assertFalse(RNSentryModuleImpl.isAllowedUri(mockUri("file", null, "/tmp/x"), null));
+  }
+
+  @Test
+  public void rejectsFileOutsideAppDirs() {
+    assertFalse(RNSentryModuleImpl.isAllowedUri(mockUri("file", null, "/etc/passwd"), ctx));
+  }
+
+  @Test
+  public void rejectsFileTargetingInternalDatabases() {
+    assertFalse(
+        RNSentryModuleImpl.isAllowedUri(
+            mockUri("file", null, "/data/data/com.example.app/databases/app.db"), ctx));
+  }
+
+  @Test
+  public void allowsFileInsideFilesDir() throws IOException {
+    File target = new File(filesDir, "picked.jpg");
+    target.createNewFile();
+    assertTrue(
+        RNSentryModuleImpl.isAllowedUri(mockUri("file", null, target.getAbsolutePath()), ctx));
+  }
+
+  @Test
+  public void allowsFileInsideCacheDir() throws IOException {
+    File target = new File(cacheDir, "thumb.png");
+    target.createNewFile();
+    assertTrue(
+        RNSentryModuleImpl.isAllowedUri(mockUri("file", null, target.getAbsolutePath()), ctx));
+  }
+
+  @Test
+  public void rejectsFileWithTraversalEscape() throws IOException {
+    File outside = new File(tempFolder.getRoot(), "outside.txt");
+    outside.createNewFile();
+    String traversal = filesDir.getAbsolutePath() + "/../outside.txt";
+    assertFalse(RNSentryModuleImpl.isAllowedUri(mockUri("file", null, traversal), ctx));
+  }
+
+  @Test
+  public void rejectsPrefixCollision() throws IOException {
+    // If filesDir is <root>/files, a path <root>/filesEvil/victim must not match as inside
+    // filesDir.
+    File sibling = new File(tempFolder.getRoot(), "filesEvil");
+    assertTrue(sibling.mkdirs());
+    File victim = new File(sibling, "victim.txt");
+    victim.createNewFile();
+    assertFalse(
+        RNSentryModuleImpl.isAllowedUri(mockUri("file", null, victim.getAbsolutePath()), ctx));
+  }
+
+  @Test
+  public void rejectsEmptyFilePath() {
+    assertFalse(RNSentryModuleImpl.isAllowedUri(mockUri("file", null, ""), ctx));
+    assertFalse(RNSentryModuleImpl.isAllowedUri(mockUri("file", null, null), ctx));
+  }
+}
diff --git a/packages/core/ios/RNSentry.mm b/packages/core/ios/RNSentry.mm
index 5376525bf1..4e14f87a98 100644
--- a/packages/core/ios/RNSentry.mm
+++ b/packages/core/ios/RNSentry.mm
@@ -864,6 +864,43 @@ + (BOOL)captureReplayWithReturnValue
 #endif
 }
 
+#if TARGET_OS_IPHONE || TARGET_OS_MACCATALYST
+static BOOL RNSentryIsPathUnderAllowedRoots(NSString *path)
+{
+    if (path.length == 0) {
+        return NO;
+    }
+    for (NSString *component in path.pathComponents) {
+        if ([component isEqualToString:@".."]) {
+            return NO;
+        }
+    }
+    NSString *resolved = [path stringByResolvingSymlinksInPath];
+    NSMutableArray<NSString *> *roots = [NSMutableArray arrayWithCapacity:3];
+    NSString *tmp = NSTemporaryDirectory();
+    if (tmp.length > 0) {
+        [roots addObject:[tmp stringByResolvingSymlinksInPath]];
+    }
+    NSArray<NSString *> *caches = NSSearchPathForDirectoriesInDomains(
+        NSCachesDirectory, NSUserDomainMask, YES);
+    if (caches.firstObject) {
+        [roots addObject:[caches.firstObject stringByResolvingSymlinksInPath]];
+    }
+    NSArray<NSString *> *docs = NSSearchPathForDirectoriesInDomains(
+        NSDocumentDirectory, NSUserDomainMask, YES);
+    if (docs.firstObject) {
+        [roots addObject:[docs.firstObject stringByResolvingSymlinksInPath]];
+    }
+    for (NSString *root in roots) {
+        NSString *rootWithSlash = [root hasSuffix:@"/"] ? root : [root stringByAppendingString:@"/"];
+        if ([resolved isEqualToString:root] || [resolved hasPrefix:rootWithSlash]) {
+            return YES;
+        }
+    }
+    return NO;
+}
+#endif
+
 RCT_EXPORT_METHOD(getDataFromUri : (NSString *_Nonnull)uri resolve : (
     RCTPromiseResolveBlock)resolve rejecter : (RCTPromiseRejectBlock)reject)
 {
@@ -873,6 +910,12 @@ + (BOOL)captureReplayWithReturnValue
         reject(@"SentryReactNative", @"The provided URI is not a valid file:// URL", nil);
         return;
     }
+    if (!RNSentryIsPathUnderAllowedRoots(fileURL.path)) {
+        reject(@"SentryReactNative",
+            @"The provided URI points outside the app's temporary, caches, or documents directories",
+            nil);
+        return;
+    }
     NSError *error = nil;
     NSData *fileData = [NSData dataWithContentsOfURL:fileURL options:0 error:&error];
     if (error || !fileData) {