Bug ID 1623601: Invalid PCRE expressions are allowed

Last Modified: Jul 28, 2026

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

Fixed In:
21.0.0.3, 17.5.1.8, 17.1.3.4

Opened: Aug 05, 2024

Severity: 2-Critical

Symptoms

Some invalid PCRE expressions pass config validation and are stored.

Impact

ASM goes into a restart loop.

Conditions

PCRE validation is used for parameters

Workaround

None

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips