diff --git a/meta/recipes-devtools/python/python3-git/CVE-2026-76221.patch b/meta/recipes-devtools/python/python3-git/CVE-2026-76221.patch
new file mode 100644
index 0000000000..c6ebdebb5e
--- /dev/null
+++ b/meta/recipes-devtools/python/python3-git/CVE-2026-76221.patch
@@ -0,0 +1,44 @@
+From 46f9c03ed10d25146293003791476955f8b26a73 Mon Sep 17 00:00:00 2001
+From: Byron <sebastian.thiel@icloud.com>
+Date: Sun, 2 Aug 2026 08:57:12 +0000
+Subject: [PATCH] Reject syntax-bearing git config option names
+
+Restrict option names to the existing safe character set.
+
+CVE: CVE-2026-76221
+Upstream-Status: Backport [https://github.com/gitpython-developers/GitPython/commit/a495ccd3b547ccd60b2187215823b72a9c0188bf]
+
+Backport Changes:
+- Omitted test/test_config.py because the current PyPI source 
+  archive does not include the test suite and the python3-git 
+  recipe does not run it.
+
+(cherry picked from commit a495ccd3b547ccd60b2187215823b72a9c0188bf)
+Signed-off-by: Yogita Urade <yurade@cisco.com>
+---
+ git/config.py | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/git/config.py b/git/config.py
+index 21f6e8aa..30218dba 100644
+--- a/git/config.py
++++ b/git/config.py
+@@ -75,6 +75,9 @@ See: https://git-scm.com/docs/git-config#_conditional_includes
+ UNSAFE_CONFIG_CHARS_RE = re.compile(r"[\r\n\x00]")
+ """Characters that cannot be safely written in config names or values."""
+ 
++VALID_CONFIG_OPTION_NAME_RE = re.compile(r"^[A-Za-z0-9_.-]+$")
++"""Pattern for option names that can be written without changing config syntax."""
++
+ 
+ class MetaParserBuilder(abc.ABCMeta):  # noqa: B024
+     """Utility class wrapping base-class methods into decorators that assure read-only
+@@ -876,6 +879,8 @@ class GitConfigParser(cp.RawConfigParser, metaclass=MetaParserBuilder):
+     def _assure_config_name_safe(self, name: "cp._SectionName", label: str) -> None:
+         if isinstance(name, str) and UNSAFE_CONFIG_CHARS_RE.search(name):
+             raise ValueError("Git config %s names must not contain CR, LF, or NUL" % label)
++        if label == "option" and isinstance(name, str) and not VALID_CONFIG_OPTION_NAME_RE.fullmatch(name):
++            raise ValueError("Git config option names may contain only letters, digits, '-', '_', or '.'")
+         if label == "section" and isinstance(name, str):
+             in_quotes = False
+             escaped = False
diff --git a/meta/recipes-devtools/python/python3-git_3.1.43.bb b/meta/recipes-devtools/python/python3-git_3.1.43.bb
index d6b5cdb00e..8579b298e0 100644
--- a/meta/recipes-devtools/python/python3-git_3.1.43.bb
+++ b/meta/recipes-devtools/python/python3-git_3.1.43.bb
@@ -35,6 +35,7 @@ SRC_URI += "file://CVE-2026-42284.patch \
            file://CVE-2026-73621.patch \
            file://CVE-2026-73620.patch \
            file://CVE-2026-73619.patch \
+           file://CVE-2026-76221.patch \
            "
 SRC_URI[sha256sum] = "35f314a9f878467f5453cc1fee295c3e18e52f1b99f10f6cf5b1682e968a9e7c"