Bug ID 2238385: Some Regular Expressions In JSON Schema Can Cause Traffic To Be Blocked

Last Modified: Jun 09, 2026

Affected Product(s):
BIG-IP ASM(all modules)

Known Affected Versions:
17.1.3.1, 17.1.3.2, 17.5.1.4, 17.5.1.5, 17.5.1.6, 21.0.0, 21.0.0.1

Opened: Mar 09, 2026

Severity: 3-Major

Symptoms

A legitimate request is blocked with a violation "JSON data does not comply with JSON schema"

Impact

Legitimate traffic may be blocked

Conditions

- Violation "JSON data does not comply with JSON schema" is set to Block - JSON content profile with JSON schema file attached - The attached JSON schema contains a "pattern" field with a specific regex

Workaround

N/A

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips