BugZero | F5 BugID 520090 - Flows are closed as expired rather than closed gra...

F5 - Defect ID: 520090

Flows are closed as expired rather than closed gracefully.

F5 - Defect ID: 520090

Flows are closed as expired rather than closed gracefully.

Last updated on July 18th, 2026

BugZero Risk Score
8.6 High

Overall: 8.6

Severity: 9.1

Community: 4.2

Lifecycle: 8.3

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Bug Details

Priority: 2-Critical
Status: Verified
Impact Category: Access Policy Manager

Description

Symptoms

Flows are closed as expired rather than closed gracefully.

Impact

Response timeouts.

Conditions

BIG-IP is passing about 400 requests per second, which causes system congestion.

Workaround

None.

Fix Information

The BIG-IP now closes TCP connection after requests for FPS JavaScript.

Change history

Links

Original Vendor Announcement

Relevant Products

Click on a version to see all relevant bugs

Affected versions:11.6.0, 11.6.0 hf1, 11.6.0 hf2, 11.6.0 hf3, 11.6.0 hf4, 11.6.0 hf5, 11.6.0 hf6, 11.6.0 hf7, 11.6.0 hf8, 11.6.1, 11.6.1 hf1, 11.6.1 hf2, 11.6.2, 11.6.2 hf1, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3, 12.1.0, 12.1.0 hf1, 12.1.0 hf2, 12.1.1, 12.1.1 hf1, 12.1.1 hf2, 12.1.2, 12.1.2 hf1, 12.1.2 hf2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4, 12.1.4.1, 12.1.5, 12.1.5.1, 12.1.5.2, 12.1.5.3, 12.1.6

Fixed versions: 12.0.0, 12.0.0

Relevant Products

Click on a version to see all relevant bugs

Fixed versions: 12.0.0, 12.0.0

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F5 Integration

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BugZero Plan

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F5 - Defect ID: 520090

Flows are closed as expired rather than closed gracefully.

F5 - Defect ID: 520090

Flows are closed as expired rather than closed gracefully.

Last updated on July 18th, 2026

BugZero Risk Score8.6 High

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

F5 - Defect ID: 520090

Flows are closed as expired rather than closed gracefully.

F5 - Defect ID: 520090

Flows are closed as expired rather than closed gracefully.

Last updated on July 18th, 2026

BugZero Risk Score8.6 High

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
8.6 High

BugZero Risk Score
8.6 High