diff --git a/SPECS/ruby/ruby.signatures.json b/SPECS/ruby/ruby.signatures.json
index e5159015a95..23d561aed19 100644
--- a/SPECS/ruby/ruby.signatures.json
+++ b/SPECS/ruby/ruby.signatures.json
@@ -1,5 +1,5 @@
 {
  "Signatures": {
-  "ruby-2.6.3.tar.xz": "11a83f85c03d3f0fc9b8a9b6cad1b2674f26c5aaa43ba858d4b0fcc2b54171e1"
+  "ruby-2.6.6.tar.xz": "5db187882b7ac34016cd48d7032e197f07e4968f406b0690e20193b9b424841f"
  }
 }
\ No newline at end of file
diff --git a/SPECS/ruby/ruby.spec b/SPECS/ruby/ruby.spec
index 028e6ae06eb..8fbb4e49624 100644
--- a/SPECS/ruby/ruby.spec
+++ b/SPECS/ruby/ruby.spec
@@ -1,7 +1,7 @@
 Summary:        Ruby
 Name:           ruby
-Version:        2.6.3
-Release:        3%{?dist}
+Version:        2.6.6
+Release:        1%{?dist}
 License:        (Ruby or BSD) and Public Domain and MIT and CC0 and zlib and UCD
 URL:            https://www.ruby-lang.org/en/
 Group:          System Environment/Security
@@ -53,6 +53,8 @@ rm -rf %{buildroot}/*
 %{_mandir}/man5/*
 
 %changelog
+*   Thu Oct 15 2020 Emre Girgin <mrgirgin@microsoft.com> 2.6.6-1
+-   Upgrade to 2.6.6 to resolve CVEs.
 *   Sat May 09 00:20:42 PST 2020 Nick Samson <nisamson@microsoft.com> - 2.6.3-3
 -   Added %%license line automatically
 *   Wed May 06 2020 Pawel Winogrodzki <pawelwi@microsoft.com> 2.6.3-2
diff --git a/cgmanifest.json b/cgmanifest.json
index dca184a1cee..8cfda875d4b 100644
--- a/cgmanifest.json
+++ b/cgmanifest.json
@@ -5086,8 +5086,8 @@
         "type": "other",
         "other": {
           "name": "ruby",
-          "version": "2.6.3",
-          "downloadUrl": "https://cache.ruby-lang.org/pub/ruby/2.6/ruby-2.6.3.tar.xz"
+          "version": "2.6.6",
+          "downloadUrl": "https://cache.ruby-lang.org/pub/ruby/2.6/ruby-2.6.6.tar.xz"
         }
       }
     },