diff --git a/server/api/coverartarchive/index.ts b/server/api/coverartarchive/index.ts
index 6422d8be..6b63e71b 100644
--- a/server/api/coverartarchive/index.ts
+++ b/server/api/coverartarchive/index.ts
@@ -150,42 +150,84 @@ class CoverArtArchive extends ExternalAPI {
   ): Promise<Record<string, string | null>> {
     if (!ids.length) return {};
 
+    const validIds = ids.filter(
+      (id) =>
+        typeof id === 'string' &&
+        /^[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$/.test(
+          id
+        )
+    );
+
+    if (!validIds.length) return {};
+
     const metadataRepository = getRepository(MetadataAlbum);
     const existingMetadata = await metadataRepository.find({
-      where: { mbAlbumId: In(ids) },
+      where: { mbAlbumId: In(validIds) },
       select: ['mbAlbumId', 'caaUrl', 'updatedAt'],
     });
 
+    const metadataMap = new Map(
+      existingMetadata.map((metadata) => [metadata.mbAlbumId, metadata])
+    );
+
     const results: Record<string, string | null> = {};
     const idsToFetch: string[] = [];
 
-    ids.forEach((id) => {
-      const metadata = existingMetadata.find((m) => m.mbAlbumId === id);
+    for (const id of validIds) {
+      const metadata = metadataMap.get(id);
 
       if (metadata?.caaUrl) {
-        results[id] = metadata.caaUrl;
+        Object.defineProperty(results, id, {
+          value: metadata.caaUrl,
+          enumerable: true,
+          writable: true,
+        });
       } else if (metadata && !this.isMetadataStale(metadata)) {
-        results[id] = null;
+        Object.defineProperty(results, id, {
+          value: null,
+          enumerable: true,
+          writable: true,
+        });
       } else {
         idsToFetch.push(id);
       }
-    });
+    }
 
     if (idsToFetch.length > 0) {
-      const batchPromises = idsToFetch.map((id) =>
-        this.fetchCoverArt(id)
-          .then((response) => {
-            const frontImage = response.images.find((img) => img.front);
-            results[id] = frontImage?.thumbnails?.[250] || null;
-            return true;
-          })
-          .catch(() => {
-            results[id] = null;
-            return false;
-          })
-      );
+      try {
+        const batchPromises = idsToFetch.map((id) =>
+          this.fetchCoverArt(id)
+            .then((response) => {
+              const frontImage = response.images.find((img) => img.front);
+              Object.defineProperty(results, id, {
+                value: frontImage?.thumbnails?.[250] || null,
+                enumerable: true,
+                writable: true,
+              });
+              return true;
+            })
+            .catch((error) => {
+              logger.error('Failed to fetch cover art', {
+                label: 'CoverArtArchive',
+                id,
+                error: error instanceof Error ? error.message : 'Unknown error',
+              });
+              Object.defineProperty(results, id, {
+                value: null,
+                enumerable: true,
+                writable: true,
+              });
+              return false;
+            })
+        );
 
-      await Promise.all(batchPromises);
+        await Promise.all(batchPromises);
+      } catch (error) {
+        logger.error('Failed to process cover art requests', {
+          label: 'CoverArtArchive',
+          error: error instanceof Error ? error.message : 'Unknown error',
+        });
+      }
     }
 
     return results;
diff --git a/server/api/musicbrainz/index.ts b/server/api/musicbrainz/index.ts
index 6271383c..f57b868e 100644
--- a/server/api/musicbrainz/index.ts
+++ b/server/api/musicbrainz/index.ts
@@ -98,16 +98,27 @@ class MusicBrainz extends ExternalAPI {
     artistMbid: string;
     language?: string;
   }): Promise<{ title: string; url: string; content: string } | null> {
+    if (
+      !artistMbid ||
+      typeof artistMbid !== 'string' ||
+      !/^[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$/.test(
+        artistMbid
+      )
+    ) {
+      throw new Error('Invalid MusicBrainz artist ID format');
+    }
+
     try {
-      const response = await fetch(
-        `https://musicbrainz.org/artist/${artistMbid}/wikipedia-extract`,
-        {
-          headers: {
-            Accept: 'application/json',
-            'Accept-Language': language,
-          },
-        }
-      );
+      const safeUrl = `https://musicbrainz.org/artist/${artistMbid}/wikipedia-extract`;
+
+      const response = await fetch(safeUrl, {
+        headers: {
+          Accept: 'application/json',
+          'Accept-Language': language,
+          'User-Agent':
+            'Jellyseerr/1.0.0 (https://github.com/Fallenbagel/jellyseerr)',
+        },
+      });
 
       if (!response.ok) {
         throw new Error(`HTTP error! status: ${response.status}`);
@@ -115,7 +126,7 @@ class MusicBrainz extends ExternalAPI {
 
       const data = await response.json();
       if (!data.wikipediaExtract || !data.wikipediaExtract.content) {
-        throw new Error('No Wikipedia extract found');
+        return null;
       }
 
       const cleanContent = purify.sanitize(data.wikipediaExtract.content, {
@@ -129,7 +140,11 @@ class MusicBrainz extends ExternalAPI {
         content: cleanContent.trim(),
       };
     } catch (error) {
-      throw new Error(`Error fetching Wikipedia extract: ${error.message}`);
+      throw new Error(
+        `[MusicBrainz] Failed to fetch Wikipedia extract: ${
+          error instanceof Error ? error.message : 'Unknown error'
+        }`
+      );
     }
   }
 
diff --git a/src/components/ArtistDetails/index.tsx b/src/components/ArtistDetails/index.tsx
index a4ac63da..462f1cb6 100644
--- a/src/components/ArtistDetails/index.tsx
+++ b/src/components/ArtistDetails/index.tsx
@@ -360,6 +360,30 @@ const ArtistDetails = () => {
     async (albumType: string): Promise<void> => {
       if (!artistId) return;
 
+      if (
+        !/^[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$/.test(
+          artistId
+        )
+      ) {
+        return;
+      }
+
+      const validAlbumTypes = [
+        'Album',
+        'EP',
+        'Single',
+        'Live',
+        'Compilation',
+        'Remix',
+        'Soundtrack',
+        'Broadcast',
+        'Demo',
+        'Other',
+      ];
+      if (!validAlbumTypes.includes(albumType)) {
+        return;
+      }
+
       setAlbumTypes((prev) => ({
         ...prev,
         [albumType]: {
@@ -369,10 +393,11 @@ const ArtistDetails = () => {
       }));
 
       try {
+        const pageSize = Math.min(data?.typeCounts?.[albumType] || 100, 1000);
         const response = await fetch(
-          `/api/v1/artist/${artistId}?albumType=${albumType}&pageSize=${
-            data?.typeCounts?.[albumType] || 100
-          }`
+          `/api/v1/artist/${artistId}?albumType=${encodeURIComponent(
+            albumType
+          )}&pageSize=${pageSize}`
         );
 
         if (response.ok) {
diff --git a/src/components/PersonDetails/index.tsx b/src/components/PersonDetails/index.tsx
index 690c117b..f002428f 100644
--- a/src/components/PersonDetails/index.tsx
+++ b/src/components/PersonDetails/index.tsx
@@ -392,6 +392,31 @@ const PersonDetails = () => {
     async (albumType: string): Promise<void> => {
       if (!personId) return;
 
+      const parsedPersonId = parseInt(personId, 10);
+      if (
+        isNaN(parsedPersonId) ||
+        parsedPersonId <= 0 ||
+        parsedPersonId.toString() !== personId
+      ) {
+        return;
+      }
+
+      const validAlbumTypes = [
+        'Album',
+        'EP',
+        'Single',
+        'Live',
+        'Compilation',
+        'Remix',
+        'Soundtrack',
+        'Broadcast',
+        'Demo',
+        'Other',
+      ];
+      if (!validAlbumTypes.includes(albumType)) {
+        return;
+      }
+
       setAlbumTypes((prev) => ({
         ...prev,
         [albumType]: {
@@ -401,9 +426,14 @@ const PersonDetails = () => {
       }));
 
       try {
-        const pageSize = data?.artist?.typeCounts?.[albumType] || 100;
+        const pageSize = Math.min(
+          data?.artist?.typeCounts?.[albumType] || 100,
+          1000
+        );
         const response = await fetch(
-          `/api/v1/person/${personId}?albumType=${albumType}&pageSize=${pageSize}`
+          `/api/v1/person/${parsedPersonId}?albumType=${encodeURIComponent(
+            albumType
+          )}&pageSize=${pageSize}`
         );
 
         if (response.ok) {
@@ -434,7 +464,7 @@ const PersonDetails = () => {
             },
           }));
         }
-      } catch {
+      } catch (error) {
         setAlbumTypes((prev) => ({
           ...prev,
           [albumType]: {