diff --git a/meta-networking/recipes-support/unbound/unbound/CVE-2026-77860.patch b/meta-networking/recipes-support/unbound/unbound/CVE-2026-77860.patch
new file mode 100644
index 0000000000..266166b729
--- /dev/null
+++ b/meta-networking/recipes-support/unbound/unbound/CVE-2026-77860.patch
@@ -0,0 +1,31 @@
+From 46671c9294ef76e2056a447eca8a561f3f48719e Mon Sep 17 00:00:00 2001
+From: "W.C.A. Wijngaards" <wouter@nlnetlabs.nl>
+Date: Wed, 16 Sep 2026 09:29:04 +0200
+Subject: [PATCH] - Fix CVE-2026-77860, 'serve-expired' can bypass Unbound
+ 'wait-limit'.   Thanks to Xuanchao Xie, Lutong Chen, and Kaiping Xue from the
+   University of Science and Technology of China (USTC) for the   report.
+
+(cherry picked from commit bd71e3b8a6dd87682bf454dc3687fc9e70b1bb78)
+
+CVE: CVE-2026-77860
+Upstream-Status: Backport [https://github.com/NLnetLabs/unbound/commit/bd71e3b8a6dd87682bf454dc3687fc9e70b1bb78]
+
+Signed-off-by: Ankur Tyagi <ankur.tyagi85@gmail.com>
+---
+ services/mesh.c | 3 +--
+ 1 file changed, 1 insertion(+), 2 deletions(-)
+
+diff --git a/services/mesh.c b/services/mesh.c
+index a6798953e..20e4f1a26 100644
+--- a/services/mesh.c
++++ b/services/mesh.c
+@@ -2563,8 +2563,7 @@ mesh_serve_expired_callback(void* arg)
+ 		if(r->query_reply.c->tcp_req_info)
+ 			tcp_req_info_remove_mesh_state(r->query_reply.c->tcp_req_info, mstate);
+ 		/* mesh_send_reply removed mesh state from http2_stream. */
+-		infra_wait_limit_dec(mstate->s.env->infra_cache,
+-			&r->query_reply, mstate->s.env->cfg);
++		/* mesh_send_reply decremented wait_limit. */
+ 		prev = r;
+ 		prev_buffer = r_buffer;
+ 	}
diff --git a/meta-networking/recipes-support/unbound/unbound_1.24.2.bb b/meta-networking/recipes-support/unbound/unbound_1.24.2.bb
index 1ab81879f2..1d810fba6c 100644
--- a/meta-networking/recipes-support/unbound/unbound_1.24.2.bb
+++ b/meta-networking/recipes-support/unbound/unbound_1.24.2.bb
@@ -46,6 +46,7 @@ SRC_URI = "git://github.com/NLnetLabs/unbound.git;protocol=https;branch=master;t
            file://CVE-2026-80225.patch \
            file://CVE-2026-81642.patch \
            file://CVE-2026-78227.patch \
+           file://CVE-2026-77860.patch \
            "
 
 SRCREV = "f6269baa605d31859f28770e01a24e3677e5f82c"