diff --git a/SOURCES/yelp-xsl-CVE-2025-3155.patch b/SOURCES/yelp-xsl-CVE-2025-3155.patch
new file mode 100644
index 0000000..36d9ae3
--- /dev/null
+++ b/SOURCES/yelp-xsl-CVE-2025-3155.patch
@@ -0,0 +1,92 @@
+From 6902d7439c0419055e1c48c7771629ccbb278408 Mon Sep 17 00:00:00 2001
+From: Shaun McCance <shaunm@redhat.com>
+Date: Fri, 18 Apr 2025 11:31:18 -0400
+Subject: [PATCH] Initial fix for CVE-2025-3155 from parrot409
+
+https://gitlab.gnome.org/GNOME/yelp/-/issues/221
+---
+ xslt/common/html.xsl | 40 ++++++++++++++++++++++++++++++++++++++--
+ 1 file changed, 38 insertions(+), 2 deletions(-)
+
+diff --git a/xslt/common/html.xsl b/xslt/common/html.xsl
+index 77aed075..82832fb4 100644
+--- a/xslt/common/html.xsl
++++ b/xslt/common/html.xsl
+@@ -266,6 +266,16 @@ certain tokens, and you can add your own with {html.sidebar.mode}. See
+ -->
+ <xsl:param name="html.sidebar.right" select="''"/>
+ 
++<!--@@==========================================================================
++html.csp.nonce
++An optional CSP nonce string to allow the execution of scripts and styles.
++@revision[version=42.2 date=2025-02-22 status=final]
++
++This parameter takes a string value that will be added to the 'nonce' attribute
++of all 'style' and 'script' tags in the generated HTML output. This paramter is used
++to whitelist script and style tags that are allowed to be executed.
++-->
++<xsl:param name="html.csp.nonce" select="false()"/>
+ 
+ <!--**==========================================================================
+ html.output
+@@ -1124,6 +1134,11 @@ dimensions. All parameters can be automatically computed if not provided.
+     </xsl:call-template>
+   </xsl:param>
+   <style type="text/css">
++    <xsl:if test="$html.csp.nonce">
++      <xsl:attribute name="nonce">
++        <xsl:value-of select="$html.csp.nonce" />
++      </xsl:attribute>
++    </xsl:if>
+     <xsl:call-template name="html.css.content">
+       <xsl:with-param name="node" select="$node"/>
+       <xsl:with-param name="direction" select="$direction"/>
+@@ -1533,6 +1548,11 @@ copy, override this template and provide the necessary files.
+   <xsl:param name="node" select="."/>
+   <xsl:if test="$node//mml:*[1]">
+     <script type="text/javascript">
++      <xsl:if test="$html.csp.nonce">
++        <xsl:attribute name="nonce">
++          <xsl:value-of select="$html.csp.nonce" />
++        </xsl:attribute>
++      </xsl:if>
+       <xsl:attribute name="src">
+         <xsl:text>http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=MML_HTMLorMML</xsl:text>
+       </xsl:attribute>
+@@ -1558,6 +1578,11 @@ result of {html.js.content} to that file.
+ <xsl:template name="html.js.script">
+   <xsl:param name="node" select="."/>
+   <script type="text/javascript">
++    <xsl:if test="$html.csp.nonce">
++      <xsl:attribute name="nonce">
++        <xsl:value-of select="$html.csp.nonce" />
++      </xsl:attribute>
++    </xsl:if>
+     <xsl:call-template name="html.js.content">
+       <xsl:with-param name="node" select="$node"/>
+     </xsl:call-template>
+@@ -2035,8 +2060,19 @@ on all `code` elements with `"syntax"` in the class value.
+ <xsl:template name="html.js.syntax">
+   <xsl:param name="node" select="."/>
+   <xsl:if test="$html.syntax.highlight">
+-  <script type="text/javascript" src="{$html.js.root}highlight.pack.js"></script>
+-  <script><![CDATA[
++    <script type="text/javascript" src="{$html.js.root}highlight.pack.js">
++      <xsl:if test="$html.csp.nonce">
++        <xsl:attribute name="nonce">
++          <xsl:value-of select="$html.csp.nonce" />
++        </xsl:attribute>
++      </xsl:if>
++    </script>
++    <script>
++    <xsl:if test="$html.csp.nonce">
++      <xsl:attribute name="nonce">
++        <xsl:value-of select="$html.csp.nonce" />
++      </xsl:attribute>
++    </xsl:if><![CDATA[
+ document.addEventListener('DOMContentLoaded', function() {
+   var matches = document.querySelectorAll('code.syntax')
+   for (var i = 0; i < matches.length; i++) {
+-- 
+GitLab
+
diff --git a/SPECS/yelp-xsl.spec b/SPECS/yelp-xsl.spec
index 66523a0..37c4ba7 100644
--- a/SPECS/yelp-xsl.spec
+++ b/SPECS/yelp-xsl.spec
@@ -2,13 +2,15 @@
 
 Name:           yelp-xsl
 Version:        40.2
-Release:        1%{?dist}
+Release:        1%{?dist}.1
 Summary:        XSL stylesheets for the yelp help browser
 
 License:        LGPLv2+ and GPLv2+
 URL:            https://download.gnome.org/sources/yelp-xsl
 Source0:        https://download.gnome.org/sources/%{name}/40/%{name}-%{tarball_version}.tar.xz
 BuildArch:      noarch
+# https://issues.redhat.com/browse/RHEL-85926
+Patch0:         yelp-xsl-CVE-2025-3155.patch
 
 BuildRequires:  gcc
 BuildRequires:  itstool
@@ -54,6 +56,9 @@ XSL stylesheets in yelp-xsl.
 
 
 %changelog
+* Wed Apr 23 2025 David King <dking@redhat.com> - 40.2-1.1
+- Fix CVE-2025-3155 (RHEL-85926)
+
 * Mon Aug 23 2021 Kalev Lember <klember@redhat.com> - 40.2-1
 - Update to 40.2