diff --git a/meta/recipes-support/libsoup/libsoup-2.4/CVE-2026-1539.patch b/meta/recipes-support/libsoup/libsoup-2.4/CVE-2026-1539.patch
new file mode 100644
index 0000000000..e8c9ee0583
--- /dev/null
+++ b/meta/recipes-support/libsoup/libsoup-2.4/CVE-2026-1539.patch
@@ -0,0 +1,104 @@
+From 285faea567e1e2a95226201175dbf745a64a2439 Mon Sep 17 00:00:00 2001
+From: Changqing Li <changqing.li@windriver.com>
+Date: Fri, 20 Mar 2026 15:04:22 +0800
+Subject: [PATCH 4/4] Also remove Proxy-Authorization header on cross origin
+ redirect
+
+Closes #489
+
+Upstream-Status: Backport [https://gitlab.gnome.org/GNOME/libsoup/-/commit/98c1285d9d78662c38bf14b4a128af01ccfdb446]
+CVE: CVE-2026-1539
+
+Signed-off-by: Changqing Li <changqing.li@windriver.com>
+
+Backport the auth-redirect proxy validation unit tests from the upstream
+libsoup3 patch
+
+Signed-off-by: Jason Stasiak <jason.stasiak@gmail.com>
+---
+ libsoup/soup-session.c |  1 +
+ tests/httpd.conf.in    |  1 +
+ tests/proxy-test.c     | 36 ++++++++++++++++++++++++++++++++++++
+ 3 files changed, 38 insertions(+)
+
+diff --git a/libsoup/soup-session.c b/libsoup/soup-session.c
+index fadd5cd2..4cad0946 100644
+--- a/libsoup/soup-session.c
++++ b/libsoup/soup-session.c
+@@ -1192,6 +1192,7 @@ soup_session_redirect_message (SoupSession *session, SoupMessage *msg)
+ 	/* Strip all credentials on cross-origin redirect. */
+ 	if (!soup_uri_host_equal (soup_message_get_uri (msg), new_uri)) {
+ 		soup_message_headers_remove (msg->request_headers, "Authorization");
++		soup_message_headers_remove (msg->request_headers, "Proxy-Authorization");
+ 		soup_message_set_auth (msg, NULL);
+ 	}
+
+diff --git a/tests/httpd.conf.in b/tests/httpd.conf.in
+index 93fb7ff4..e190b6f7 100644
+--- a/tests/httpd.conf.in
++++ b/tests/httpd.conf.in
+@@ -37,6 +37,7 @@ DirectoryIndex index.txt
+ TypesConfig /dev/null
+ AddType application/x-httpd-php .php
+ Redirect permanent /redirected /index.txt
++Redirect permanent /Basic/realm1/redirected https://127.0.0.1:47525/index.txt
+
+ # Proxy #1: unauthenticated
+ Listen 127.0.0.1:47526
+diff --git a/tests/proxy-test.c b/tests/proxy-test.c
+index 1d68aa05..105a02a6 100644
+--- a/tests/proxy-test.c
++++ b/tests/proxy-test.c
+@@ -322,6 +322,41 @@ do_proxy_redirect_test (void)
+ 	soup_test_session_abort_unref (session);
+ }
+
++static void proxy_auth_redirect_message_restarted (SoupMessage *msg)
++{
++	if (msg->status_code != SOUP_STATUS_MOVED_PERMANENTLY)
++		return;
++
++	g_assert_null (soup_message_headers_get_one (msg->request_headers, "Proxy-Authorization"));
++}
++
++static void
++do_proxy_auth_redirect_test (void)
++{
++	SoupSession *session;
++	SoupMessage *msg;
++	char *url;
++
++	SOUP_TEST_SKIP_IF_NO_APACHE;
++	SOUP_TEST_SKIP_IF_NO_TLS;
++
++	session = soup_test_session_new (SOUP_TYPE_SESSION_ASYNC,
++		SOUP_SESSION_PROXY_RESOLVER, proxy_resolvers[AUTH_PROXY],
++		NULL);
++
++	url = g_strconcat (HTTP_SERVER, "/Basic/realm1/redirected", NULL);
++	msg = soup_message_new (SOUP_METHOD_GET, url);
++	g_signal_connect (session, "authenticate", G_CALLBACK (authenticate), NULL);
++	g_signal_connect (msg, "restarted", G_CALLBACK (proxy_auth_redirect_message_restarted), NULL);
++
++	soup_session_send_message (session, msg);
++	soup_test_assert_message_status (msg, SOUP_STATUS_OK);
++
++	g_free (url);
++	g_object_unref (msg);
++	soup_test_session_abort_unref (session);
++}
++
+ static void
+ do_proxy_auth_request (const char *url, SoupSession *session, gboolean do_read)
+ {
+@@ -433,6 +468,7 @@ main (int argc, char **argv)
+
+ 	g_test_add_data_func ("/proxy/fragment", base_uri, do_proxy_fragment_test);
+ 	g_test_add_func ("/proxy/redirect", do_proxy_redirect_test);
++	g_test_add_func ("/proxy/auth-redirect", do_proxy_auth_redirect_test);
+ 	g_test_add_func ("/proxy/auth-cache", do_proxy_auth_cache_test);
+
+ 	ret = g_test_run ();
+--
+2.55.0
+
diff --git a/meta/recipes-support/libsoup/libsoup-2.4_2.74.3.bb b/meta/recipes-support/libsoup/libsoup-2.4_2.74.3.bb
index 7e00cd678a..4fe1e36f03 100644
--- a/meta/recipes-support/libsoup/libsoup-2.4_2.74.3.bb
+++ b/meta/recipes-support/libsoup/libsoup-2.4_2.74.3.bb
@@ -41,6 +41,7 @@ SRC_URI = "${GNOME_MIRROR}/libsoup/${SHRT_VER}/libsoup-${PV}.tar.xz \
            file://CVE-2025-4476.patch \
            file://CVE-2025-2784.patch \
            file://CVE-2025-4945.patch \
+           file://CVE-2026-1539.patch \
 "
 SRC_URI[sha256sum] = "e4b77c41cfc4c8c5a035fcdc320c7bc6cfb75ef7c5a034153df1413fa1d92f13"