Update CHANGELOG.md for 11.5.7

[ci skip]

CHANGELOG.md

@@ -2,6 +2,13 @@
 documentation](doc/development/changelog.md) for instructions on adding your own
 entry.
 
+## 11.5.7 (2019-01-15)
+
+### Security (1 change)
+
+- Validate bundle files before unpacking them.
+
+
 ## 11.5.6 (2018-12-28)
 
 ### Security (17 changes)

changelogs/unreleased/security-2770-verify-bundle-import-files-11-5.yml

----
-title: Validate bundle files before unpacking them
-merge_request:
-author:
-type: security