Bug ID 2256725: Unable to trigger "Disallowed file upload content detected" violation in some cases

Last Modified: Aug 04, 2026

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

Fixed In:
21.0.0.3, 17.5.1.8

Opened: Mar 23, 2026

Severity: 3-Major

Symptoms

The "Disallowed file upload content detected" violation is not triggered in some cases.

Impact

Traffic with violation passes through.

Conditions

Under a specific traffic scenario, the violation is not triggered.

Workaround

N/A

Fix Information

The violation is now detected correctly.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips