Create s Security Policy (#4671)

* Create SECURITY.md

* Update test_files.py to include SECURITY.md file

* Update MANIFEST.in to include SECURITY.md file

MANIFEST.in

@@ -3,4 +3,4 @@ recursive-include pybind11/include/pybind11 *.h
 recursive-include pybind11 *.py
 recursive-include pybind11 py.typed
 include pybind11/share/cmake/pybind11/*.cmake
-include LICENSE README.rst pyproject.toml setup.py setup.cfg
+include LICENSE README.rst SECURITY.md pyproject.toml setup.py setup.cfg

SECURITY.md

+# Security Policy
+
+## Supported Versions
+
+Security updates are applied only to the latest release.
+
+## Reporting a Vulnerability
+
+If you have discovered a security vulnerability in this project, please report it privately. **Do not disclose it as a public issue.** This gives us time to work with you to fix the issue before public exposure, reducing the chance that the exploit will be used before a patch is released.
+
+Please disclose it at [security advisory](https://github.com/pybind/pybind11/security/advisories/new).
+
+This project is maintained by a team of volunteers on a reasonable-effort basis. As such, please give us at least 90 days to work on a fix before public exposure.

tests/extra_python_package/test_files.py

@@ -111,6 +111,7 @@ sdist_files = {
     "MANIFEST.in",
     "README.rst",
     "PKG-INFO",
+    "SECURITY.md",
 }
 
 local_sdist_files = {