diff --git a/changelog.mdx b/changelog.mdx
index 47c1347f0..2fbd5315c 100644
--- a/changelog.mdx
+++ b/changelog.mdx
@@ -7,6 +7,14 @@ keywords: ["changelog", "API updates", "release notes", "what's new", "API chang
 
 To subscribe to updates, please [**“Turn on notifications”**](https://help.x.com/en/managing-your-account/notifications-on-mobile-devices#:~:text=In%20the%20top%20menu,%20you,you%20would%20like%20to%20receive) for [**@API**](https://x.com/api). You can also follow this changelog in your feed reader via the [**RSS feed**](https://docs.x.com/changelog/rss.xml).
 
+<Update label="Sep 23, 2026" description="X API v2">
+  ### `broadcast` scopes added to OAuth 1.0a → OAuth 2.0 token exchange
+
+  When you exchange an OAuth 1.0a user token for an OAuth 2.0 token, the granted scopes now include `broadcast.read` for **Read** permissions and `broadcast.write` for **Read and write** permissions. Existing users with these OAuth 1.0a permissions can call the broadcast endpoints under OAuth 2.0 without a new consent screen.
+
+  See the [permission-to-scope mapping](/fundamentals/authentication/oauth-2-0/oauth-1-0a-token-exchange) on the OAuth 1.0a token exchange page.
+</Update>
+
 <Update label="Sep 21, 2026" description="X API v2">
   ### Migrate OAuth 1.0a user tokens to OAuth 2.0 with token exchange