diff --git a/meta-oe/recipes-devtools/flatcc/flatcc/CVE-2026-116733.patch b/meta-oe/recipes-devtools/flatcc/flatcc/CVE-2026-116733.patch
new file mode 100644
index 0000000000..86272984f7
--- /dev/null
+++ b/meta-oe/recipes-devtools/flatcc/flatcc/CVE-2026-116733.patch
@@ -0,0 +1,30 @@
+From 8fcc19366aa081068d2c845084a3ffd907c88129 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Mikkel=20Fahn=C3=B8e=20J=C3=B8rgensen?= <mikkel@dvide.com>
+Date: Thu, 22 Oct 2026 18:59:04 +0200
+Subject: [PATCH] Guard against adversarial buffer overrun in JSON parser
+
+(cherry picked from commit 356792dc155a9e685acdfe0ec1e209bdadcb4ab9)
+
+CVE: CVE-2026-116733
+Upstream-Status: Backport [https://github.com/dvidelabs/flatcc/commit/356792dc155a9e685acdfe0ec1e209bdadcb4ab9]
+
+Dropped changes to the CHANGELOG file.
+
+Signed-off-by: Ankur Tyagi <ankur.tyagi85@gmail.com>
+---
+ src/runtime/json_parser.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/runtime/json_parser.c b/src/runtime/json_parser.c
+index 4472af2..f9bc9fa 100644
+--- a/src/runtime/json_parser.c
++++ b/src/runtime/json_parser.c
+@@ -538,7 +538,7 @@ static const char *__flatcc_json_parser_number(flatcc_json_parser_t *ctx, const
+     if (buf != end) {
+         if (*buf == '.') {
+             ++buf;
+-            if (*buf < '0' || *buf > '9') {
++            if (buf == end || *buf < '0' || *buf > '9') {
+                 return flatcc_json_parser_set_error(ctx, buf, end, flatcc_json_parser_error_invalid_numeric);
+             }
+             ++buf;
diff --git a/meta-oe/recipes-devtools/flatcc/flatcc_0.6.4.bb b/meta-oe/recipes-devtools/flatcc/flatcc_0.6.4.bb
index 059f888eed..9defbfac04 100644
--- a/meta-oe/recipes-devtools/flatcc/flatcc_0.6.4.bb
+++ b/meta-oe/recipes-devtools/flatcc/flatcc_0.6.4.bb
@@ -6,7 +6,9 @@ SECTION = "devel/lib"
 LICENSE = "Apache-2.0"
 LIC_FILES_CHKSUM = "file://LICENSE;md5=b3d8fb7158bf7e2600ba3191428dc4ef"
 
-SRC_URI = "git://github.com/dvidelabs/flatcc.git;protocol=https;branch=master;tag=v${PV}"
+SRC_URI = "git://github.com/dvidelabs/flatcc.git;protocol=https;branch=master;tag=v${PV} \
+           file://CVE-2026-116733.patch \
+"
 SRCREV = "fec0275c0d0c5b6f495ab48d51fcde521d72b5fc"
 
 inherit cmake