diff --git a/backport-CVE-2025-11731-End-function-node-ancestor-search-at-document.patch b/backport-CVE-2025-11731-End-function-node-ancestor-search-at-document.patch
new file mode 100644
index 0000000000000000000000000000000000000000..cdd6b5d7fcd2ea7f543e645d5f8b41e7272418a7
--- /dev/null
+++ b/backport-CVE-2025-11731-End-function-node-ancestor-search-at-document.patch
@@ -0,0 +1,36 @@
+From fe508f201efb9ea37bfbe95413b8b28251497de3 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Dominik=20R=C3=B6ttsches?= <drott@chromium.org>
+Date: Wed, 27 Aug 2025 14:28:40 +0300
+Subject: [PATCH] End function node ancestor search at document
+
+Avoids dereferencing a non-existent ->ns property on an
+XML_DOCUMENT_NODE pointer.
+
+Fixes #151.
+---
+ libexslt/functions.c | 9 +++++++--
+ 1 file changed, 7 insertions(+), 2 deletions(-)
+
+diff --git a/libexslt/functions.c b/libexslt/functions.c
+index 8d35a7ae..a54ee70c 100644
+--- a/libexslt/functions.c
++++ b/libexslt/functions.c
+@@ -617,8 +617,13 @@ exsltFuncResultComp (xsltStylesheetPtr style, xmlNodePtr inst,
+      * instanciation of a func:result element.
+      */
+     for (test = inst->parent; test != NULL; test = test->parent) {
+-	if (IS_XSLT_ELEM(test) &&
+-	    IS_XSLT_NAME(test, "stylesheet")) {
++	if (/* Traversal has reached the top-level document without
++         * finding a func:function ancestor. */
++        (test != NULL && test->type == XML_DOCUMENT_NODE) ||
++        /* Traversal reached a stylesheet-namespace node,
++         * and has left the function namespace. */
++        (IS_XSLT_ELEM(test) &&
++         IS_XSLT_NAME(test, "stylesheet"))) {
+ 	    xsltGenericError(xsltGenericErrorContext,
+ 			     "func:result element not a descendant "
+ 			     "of a func:function\n");
+-- 
+2.33.0
+
diff --git a/libxslt.spec b/libxslt.spec
index c5de5b9e06f4431ed05c7f749c408b702767f456..eee33fe169ad4dfb08d7367ec7d315c15fc34bbb 100644
--- a/libxslt.spec
+++ b/libxslt.spec
@@ -1,6 +1,6 @@
 Name:     libxslt
 Version:  1.1.39
-Release:  6
+Release:  7
 Summary:  XSLT Transformation Library
 License:  MIT
 URL:      https://gitlab.gnome.org/GNOME/libxslt
@@ -11,6 +11,7 @@ Patch1: CVE-2024-55549.patch
 Patch2: CVE-2025-24855.patch
 Patch3: backport-CVE-2025-7424.patch
 Patch4: backport-CVE-2025-10911.patch
+Patch5: backport-CVE-2025-11731-End-function-node-ancestor-search-at-document.patch
 
 Patch9001:huawei-add-autogen.sh-for-fuzz-compile.patch
 
@@ -106,6 +107,9 @@ pushd $RPM_BUILD_ROOT/%{_includedir}/%{name}; touch -m --reference=xslt.h ../../
 %exclude %{_docdir}/../licenses/libxslt/Copyright
 
 %changelog
+* Tue Oct 14 2025 fuanan <fuanan3@h-partners.com> - 1.1.39-7
+- fix CVE-2025-11731
+
 * Thu Oct 9 2025 fuanan <fuanan3@h-partners.com> - 1.1.39-6
 - fix CVE-2025-10911