Last Modified: May 05, 2026
Affected Product(s):
BIG-IP ASM
Fixed In:
17.5.1.6, 17.1.3.2
Opened: Jan 14, 2026 Severity: 4-Minor
When a request contains a parameter with a zero-length value, the system fails to recognize it as having zero length and instead displays the parameter as having an empty value.
GUI displays parameter length with an empty value when the parameter has zero length
Using GUI with "Illegal parameter value length" violation
Modify checking the parameter length also for zero length
Modified the condition logic to use <= instead of < when comparing parameter lengths, ensuring zero-length values are correctly set