From e809e6364db15bec778f3685320c6793b7b7c966 Mon Sep 17 00:00:00 2001
From: Campbell Barton <campbell@blender.org>
Date: Wed, 15 Oct 2025 07:59:23 +0000
Subject: [PATCH] PyAPI: prevent indices below -1 being used by
 StructRNA.path_from_module

Disable this as RNA paths don't support Python-style negative indexing.

Ref !147255
---
 source/blender/python/intern/bpy_rna.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/source/blender/python/intern/bpy_rna.cc b/source/blender/python/intern/bpy_rna.cc
index 05f301e7de9..9c3b2e8ce3a 100644
--- a/source/blender/python/intern/bpy_rna.cc
+++ b/source/blender/python/intern/bpy_rna.cc
@@ -4016,6 +4016,7 @@ PyDoc_STRVAR(
     "         The incomplete path will be printed in the error message.\n");
 static PyObject *pyrna_struct_path_from_module(BPy_StructRNA *self, PyObject *args)
 {
+  const char *error_prefix = "path_from_module(...)";
   const char *name = nullptr;
   PropertyRNA *prop;
   int index = -1;
@@ -4025,6 +4026,10 @@ static PyObject *pyrna_struct_path_from_module(BPy_StructRNA *self, PyObject *ar
   if (!PyArg_ParseTuple(args, "|si:path_from_module", &name, &index)) {
     return nullptr;
   }
+  if (index < -1) {
+    PyErr_Format(PyExc_ValueError, "%s: indices below -1 are not supported", error_prefix);
+    return nullptr;
+  }
 
   std::optional<std::string> path;
   if (name) {