diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index bc3ea34..aacd2ef 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -768,6 +768,7 @@
 -  Fixed a bug (#3161) - :doc:`Cache Library <libraries/caching>` methods `increment()`, `decrement()` didn't auto-create non-existent items when using redis and/or file storage.
 -  Fixed a bug (#3189) - :doc:`Parser Library <libraries/parser>` used double replacement on ``key->value`` pairs, exposing a potential template injection vulnerability.
 -  Fixed a bug (#3573) - :doc:`Email Library <libraries/email>` violated `RFC5321 <https://tools.ietf.org/rfc/rfc5321.txt>`_ by sending 'localhost.localdomain' as a hostname.
+-  Fixed a bug (#3572) - :doc:`CI_Security::_remove_evil_attributes()` failed for large-sized inputs due to *pcre.backtrack_limit* and didn't properly match HTML tags.
 
 Version 2.2.1
 =============