Bug ID 2297737: Base64 Decoding is enabled for parameters imported from OpenAPI files

Last Modified: Jul 28, 2026

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

Fixed In:
21.1.0.1, 21.0.0.3, 17.5.1.8, 17.1.3.4

Opened: May 20, 2026

Severity: 3-Major

Symptoms

When creating a policy from an OpenAPI file containing a parameter defined with type: string and format: binary, the resulting parameter is configured with "Base64 Decoding" enabled

Impact

Base64 Decoding enabled in GUI

Conditions

An OpenAPI file is imported to create an ASM policy, and the file contains a parameter defined with type: string and format: binary

Workaround

Base64 Decoding disabled in GUI

Fix Information

Changed flg_detect_base64 to 0 to be disabled

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips