From 7d1b33b59ed0bb00bcd3d5e3e4e98032db00e43b Mon Sep 17 00:00:00 2001
From: automated-signal <37887102+automated-signal@users.noreply.github.com>
Date: Mon, 1 Jun 2026 08:33:58 -0500
Subject: [PATCH] Improve too-long message body checks

Co-authored-by: trevor-signal <131492920+trevor-signal@users.noreply.github.com>
---
 ts/textsecure/MessageReceiver.preload.ts | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/ts/textsecure/MessageReceiver.preload.ts b/ts/textsecure/MessageReceiver.preload.ts
index 0fe86375d7..6126a96e51 100644
--- a/ts/textsecure/MessageReceiver.preload.ts
+++ b/ts/textsecure/MessageReceiver.preload.ts
@@ -2095,6 +2095,7 @@ export default class MessageReceiver
       const length = Buffer.byteLength(message.body);
       this.#removeFromCache(envelope);
       log.warn(`${logId}: Dropping too-long message. Length: ${length}`);
+      return;
     }
 
     strictAssert(timestamp, 'Missing sent timestamp');
@@ -2381,6 +2382,13 @@ export default class MessageReceiver
       'MessageReceiver.handleEditMesage: received message from PNI'
     );
 
+    if (message.body && isBodyTooLong(message.body)) {
+      const length = Buffer.byteLength(message.body);
+      this.#removeFromCache(envelope);
+      log.warn(`${logId}: Dropping too-long message. Length: ${length}`);
+      return;
+    }
+
     const ev = new MessageEvent(
       {
         envelopeId: envelope.id,
@@ -2496,6 +2504,7 @@ export default class MessageReceiver
       const length = Buffer.byteLength(message.body);
       this.#removeFromCache(envelope);
       log.warn(`${logId}: Dropping too-long message. Length: ${length}`);
+      return;
     }
 
     const ev = new MessageEvent(
@@ -3160,6 +3169,13 @@ export default class MessageReceiver
 
     const message = this.#processDecrypted(envelope, editMessage.dataMessage);
 
+    if (message.body && isBodyTooLong(message.body)) {
+      const length = Buffer.byteLength(message.body);
+      this.#removeFromCache(envelope);
+      log.warn(`${logId}: Dropping too-long message. Length: ${length}`);
+      return;
+    }
+
     const ev = new SentEvent(
       {
         envelopeId: envelope.id,