diff --git a/5.0/en/0x13-V5-Validation-Sanitization-Encoding.md b/5.0/en/0x13-V5-Validation-Sanitization-Encoding.md
index dab0aafce2..ce342d3790 100644
--- a/5.0/en/0x13-V5-Validation-Sanitization-Encoding.md
+++ b/5.0/en/0x13-V5-Validation-Sanitization-Encoding.md
@@ -54,6 +54,7 @@ For example:
 | **5.2.7** | Verify that the application sanitizes, disables, or sandboxes user-supplied Scalable Vector Graphics (SVG) scriptable content, especially as they relate to XSS resulting from inline scripts, and foreignObject. | ✓ | ✓ | ✓ | 159 |
 | **5.2.8** | Verify that the application sanitizes, disables, or sandboxes user-supplied scriptable or expression template language content, such as Markdown, CSS or XSL stylesheets, BBCode, or similar. | ✓ | ✓ | ✓ | 94 |
 | **5.2.9** | [ADDED] Verify that the application uses slashes to correctly escape special characters being used in regular expressions to ensure they are not misinterpreted as control characters. | ✓ | ✓ | ✓ | 624 |
+| **5.2.10** | [ADDED] Verify that regular expressions are free from elements causing exponential backtracking, and ensure untrusted input is sanitized to mitigate ReDOS / Runaway Regex attacks. | ✓ | ✓ | ✓ | 1333 |
 
 ## V5.3 Output Encoding and Injection Prevention