diff --git a/doc/src/sgml/release-9.3.sgml b/doc/src/sgml/release-9.3.sgml
index 8be44e33f610378e1347ff7b491d682d2ed1fd2a..6d339db8d333a0d7dbab77463e41edccfdddb378 100644
--- a/doc/src/sgml/release-9.3.sgml
+++ b/doc/src/sgml/release-9.3.sgml
@@ -33,6 +33,28 @@
 
    <itemizedlist>
 
+    <listitem>
+     <para>
+      Ensure that all temporary files made
+      by <application>pg_upgrade</application> are non-world-readable
+      (Tom Lane, Noah Misch)
+     </para>
+
+     <para>
+      <application>pg_upgrade</application> normally restricts its
+      temporary files to be readable and writable only by the calling user.
+      But the temporary file containing <literal>pg_dumpall -g</literal>
+      output would be group- or world-readable, or even writable, if the
+      user's <literal>umask</literal> setting allows.  In typical usage on
+      multi-user machines, the <literal>umask</literal> and/or the working
+      directory's permissions would be tight enough to prevent problems;
+      but there may be people using <application>pg_upgrade</application>
+      in scenarios where this oversight would permit disclosure of database
+      passwords to unfriendly eyes.
+      (CVE-2018-1053)
+     </para>
+    </listitem>
+
     <listitem>
      <para>
       Fix vacuuming of tuples that were updated while key-share locked
diff --git a/doc/src/sgml/release-9.4.sgml b/doc/src/sgml/release-9.4.sgml
index 8817fea473dd55ae28378d785da6964899fbf4f0..da6cf38f70a6b7b751f6c41fca52399ae98ebf94 100644
--- a/doc/src/sgml/release-9.4.sgml
+++ b/doc/src/sgml/release-9.4.sgml
@@ -33,6 +33,28 @@
 
    <itemizedlist>
 
+    <listitem>
+     <para>
+      Ensure that all temporary files made
+      by <application>pg_upgrade</application> are non-world-readable
+      (Tom Lane, Noah Misch)
+     </para>
+
+     <para>
+      <application>pg_upgrade</application> normally restricts its
+      temporary files to be readable and writable only by the calling user.
+      But the temporary file containing <literal>pg_dumpall -g</literal>
+      output would be group- or world-readable, or even writable, if the
+      user's <literal>umask</literal> setting allows.  In typical usage on
+      multi-user machines, the <literal>umask</literal> and/or the working
+      directory's permissions would be tight enough to prevent problems;
+      but there may be people using <application>pg_upgrade</application>
+      in scenarios where this oversight would permit disclosure of database
+      passwords to unfriendly eyes.
+      (CVE-2018-1053)
+     </para>
+    </listitem>
+
     <listitem>
      <para>
       Fix vacuuming of tuples that were updated while key-share locked
diff --git a/doc/src/sgml/release-9.5.sgml b/doc/src/sgml/release-9.5.sgml
index aa5fa2c5c9485085cba0f95363b986a82a7dff5e..eb99e4b67e827d42aa5bf677df7b09cf881787e8 100644
--- a/doc/src/sgml/release-9.5.sgml
+++ b/doc/src/sgml/release-9.5.sgml
@@ -33,6 +33,28 @@
 
    <itemizedlist>
 
+    <listitem>
+     <para>
+      Ensure that all temporary files made
+      by <application>pg_upgrade</application> are non-world-readable
+      (Tom Lane, Noah Misch)
+     </para>
+
+     <para>
+      <application>pg_upgrade</application> normally restricts its
+      temporary files to be readable and writable only by the calling user.
+      But the temporary file containing <literal>pg_dumpall -g</literal>
+      output would be group- or world-readable, or even writable, if the
+      user's <literal>umask</literal> setting allows.  In typical usage on
+      multi-user machines, the <literal>umask</literal> and/or the working
+      directory's permissions would be tight enough to prevent problems;
+      but there may be people using <application>pg_upgrade</application>
+      in scenarios where this oversight would permit disclosure of database
+      passwords to unfriendly eyes.
+      (CVE-2018-1053)
+     </para>
+    </listitem>
+
     <listitem>
      <para>
       Fix vacuuming of tuples that were updated while key-share locked