Symptoms

Extended Latin or non-ASCII characters (e.g., ß, à, á, ä, ç, ü) are not blocked as instructed by a regular expression in the JSON schema in the API Security based policy.

Impact

Character validation does not work as intended, allowing disallowed Unicode characters to pass through.

Conditions

This occurs when using the API Security template that includes regex-based validation rules that target Unicode ranges above U+00C0.

Workaround

None

Fix Information

Expected blocking to Latin characters in JSON schema.

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips