diff --git a/ddtrace/appsec/_iast/_taint_tracking/aspects.py b/ddtrace/appsec/_iast/_taint_tracking/aspects.py
index 374e1f46e55..56ba0cf73e5 100644
--- a/ddtrace/appsec/_iast/_taint_tracking/aspects.py
+++ b/ddtrace/appsec/_iast/_taint_tracking/aspects.py
@@ -441,6 +441,8 @@ def format_value_aspect(
     else:
         new_text = element
     if not isinstance(new_text, IAST.TEXT_TYPES):
+        if format_spec:
+            return format(new_text, format_spec)
         return format(new_text)
 
     try:
diff --git a/releasenotes/notes/fix-fstring-zeropadding-e8e463a4d8623040.yaml b/releasenotes/notes/fix-fstring-zeropadding-e8e463a4d8623040.yaml
new file mode 100644
index 00000000000..99f4706de38
--- /dev/null
+++ b/releasenotes/notes/fix-fstring-zeropadding-e8e463a4d8623040.yaml
@@ -0,0 +1,4 @@
+---
+fixes:
+  - |
+    Code Security: This fix solves an issue with fstrings where formatting was not applied to int parameters
diff --git a/tests/appsec/iast/aspects/test_str_py3.py b/tests/appsec/iast/aspects/test_str_py3.py
index 5437c631984..c93c35844cb 100644
--- a/tests/appsec/iast/aspects/test_str_py3.py
+++ b/tests/appsec/iast/aspects/test_str_py3.py
@@ -52,6 +52,11 @@ def test_string_fstring_with_format_tainted(self):
         result = mod_py3.do_repr_fstring_with_format(string_input)  # pylint: disable=no-member
         assert as_formatted_evidence(result) == "':+-foo-+:'     "
 
+    def test_int_fstring_zero_padding_tainted(self):
+        int_input = 5
+        result = mod_py3.do_zero_padding_fstring(int_input)  # pylint: disable=no-member
+        assert result == "00005"
+
     def test_string_fstring_repr_str_twice_tainted(self):
         # type: () -> None
         string_input = "foo"
diff --git a/tests/appsec/iast/fixtures/aspects/str_methods_py3.py b/tests/appsec/iast/fixtures/aspects/str_methods_py3.py
index 864e868a762..9698afed88c 100644
--- a/tests/appsec/iast/fixtures/aspects/str_methods_py3.py
+++ b/tests/appsec/iast/fixtures/aspects/str_methods_py3.py
@@ -9,6 +9,10 @@
     from typing import Tuple  # noqa:F401
 
 
+def do_zero_padding_fstring(a):  # type: (int) -> str
+    return f"{a:05d}"
+
+
 def do_fmt_value(a):  # type: (str) -> str
     return f"{a:<8s}bar"