diff --git a/src/main/resources/org/eolang/lints/critical/pos-without-line.xsl b/src/main/resources/org/eolang/lints/critical/pos-without-line.xsl
index 483555a98..00c601685 100644
--- a/src/main/resources/org/eolang/lints/critical/pos-without-line.xsl
+++ b/src/main/resources/org/eolang/lints/critical/pos-without-line.xsl
@@ -25,7 +25,7 @@
             <xsl:text>critical</xsl:text>
           </xsl:attribute>
           <xsl:text>Object </xsl:text>
-          <xsl:value-of select="@name"/>
+          <xsl:value-of select="eo:escape(@name)"/>
           <xsl:text> have the "@pos" attribute, but the "@line" attribute is absent</xsl:text>
         </xsl:element>
       </xsl:for-each>
diff --git a/src/main/resources/org/eolang/lints/misc/duplicate-names-in-diff-context.xsl b/src/main/resources/org/eolang/lints/misc/duplicate-names-in-diff-context.xsl
index c8de375c7..879f4043c 100644
--- a/src/main/resources/org/eolang/lints/misc/duplicate-names-in-diff-context.xsl
+++ b/src/main/resources/org/eolang/lints/misc/duplicate-names-in-diff-context.xsl
@@ -5,6 +5,7 @@
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" version="2.0" id="duplicate-names-in-diff-context">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:import href="/org/eolang/funcs/defect-context.xsl"/>
   <xsl:import href="/org/eolang/funcs/special-name.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
@@ -23,9 +24,9 @@
               </xsl:attribute>
             </xsl:if>
             <xsl:attribute name="severity">warning</xsl:attribute>
-            <xsl:text>Object "</xsl:text>
-            <xsl:value-of select="@name"/>
-            <xsl:text>" has the same name as </xsl:text>
+            <xsl:text>Object </xsl:text>
+            <xsl:value-of select="eo:escape(@name)"/>
+            <xsl:text> has the same name as </xsl:text>
             <xsl:variable name="lines" select="current-group()/@line[. and . != current()/@line]"/>
             <xsl:variable name="empty" select="count($lines) != count(current-group()) - 1"/>
             <xsl:if test="count($lines) &gt; 0">
diff --git a/src/test/resources/org/eolang/lints/packs/single/duplicate-names-in-diff-context/escapes-name-in-defect-message.yaml b/src/test/resources/org/eolang/lints/packs/single/duplicate-names-in-diff-context/escapes-name-in-defect-message.yaml
new file mode 100644
index 000000000..2ce4e437a
--- /dev/null
+++ b/src/test/resources/org/eolang/lints/packs/single/duplicate-names-in-diff-context/escapes-name-in-defect-message.yaml
@@ -0,0 +1,20 @@
+# SPDX-FileCopyrightText: Copyright (c) 2016-2026 Objectionary.com
+# SPDX-License-Identifier: MIT
+---
+# yamllint disable rule:line-length
+sheets:
+  - /org/eolang/lints/misc/duplicate-names-in-diff-context.xsl
+asserts:
+  - /defects[count(defect[@severity='warning'])=1]
+  - /defects/defect[contains(normalize-space(), 'Object "foo\x22bar" has the same name as')]
+document: |
+  <object author="tests">
+    <o>
+      <o>
+        <o name='foo&quot;bar' line="3"/>
+      </o>
+      <o>
+        <o name='foo&quot;bar' line="6"/>
+      </o>
+    </o>
+  </object>
diff --git a/src/test/resources/org/eolang/lints/packs/single/pos-without-line/escapes-name-in-defect-message.yaml b/src/test/resources/org/eolang/lints/packs/single/pos-without-line/escapes-name-in-defect-message.yaml
new file mode 100644
index 000000000..f6f027343
--- /dev/null
+++ b/src/test/resources/org/eolang/lints/packs/single/pos-without-line/escapes-name-in-defect-message.yaml
@@ -0,0 +1,13 @@
+# SPDX-FileCopyrightText: Copyright (c) 2016-2026 Objectionary.com
+# SPDX-License-Identifier: MIT
+---
+# yamllint disable rule:line-length
+sheets:
+  - /org/eolang/lints/critical/pos-without-line.xsl
+asserts:
+  - /defects[count(defect[@severity='critical'])=1]
+  - /defects/defect[normalize-space()='Object "foo\x22bar" have the "@pos" attribute, but the "@line" attribute is absent']
+document: |
+  <object author="tests">
+    <o pos="3" name='foo&quot;bar'/>
+  </object>