BugZero | F5 BugID 469825 - Enforcer may crash when trying to match signatures...

F5 - Defect ID: 469825

Enforcer may crash when trying to match signatures on body of re-constructed request

F5 - Defect ID: 469825

Enforcer may crash when trying to match signatures on body of re-constructed request

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: Application Security Manager

Description

Symptoms

The BIG-IP system may temporarily fail to process traffic.

Impact

The BIG-IP system may temporarily fail to process traffic.

Conditions

1. Configure blocking bot detection with fingerprint. 2. Send a POST request without a referrer with some payload that includes a content attack signature that gets a client side challenge response.

Workaround

N/A

Fix Information

We fixed an issue where rarely the Enforcer crashed when trying to match signatures on the body of a re-constructed POST request.

Change history

Links

Original Vendor Announcement

Relevant Products

Click on a version to see all relevant bugs

Affected versions:11.5.1, 11.5.1 hf1, 11.5.1 hf2, 11.5.1 hf3, 11.5.1 hf4, 11.5.1 hf5, 11.5.1 hf6, 11.5.1 hf7, 11.5.1 hf8, 11.5.1 hf9, 11.5.1 hf10, 11.5.1 hf11, 11.5.2, 11.5.2 hf1, 11.5.3, 11.5.3 hf1, 11.5.3 hf2, 11.5.4, 11.5.4 hf1, 11.5.4 hf2, 11.5.4 hf3, 11.5.4 hf4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10

Fixed versions: 11.6.0

Relevant Products

Click on a version to see all relevant bugs

Fixed versions: 11.6.0

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F5 - Defect ID: 469825

Enforcer may crash when trying to match signatures on body of re-constructed request

F5 - Defect ID: 469825

Enforcer may crash when trying to match signatures on body of re-constructed request

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: 469825

Enforcer may crash when trying to match signatures on body of re-constructed request

F5 - Defect ID: 469825

Enforcer may crash when trying to match signatures on body of re-constructed request

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