Bug ID 526610: [Portal Access] javascript: wrong parsing of try/catch within bracketless 'with' block

Last Modified: Aug 19, 2026

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

Known 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 In:
12.1.0

Opened: Jun 04, 2015

Severity: 3-Major

Symptoms

Rewrite Plugin crash

Impact

Web-Application misfunction.

Conditions

Very specific javascript for patching: with(x) try { /* nothing */ } catch (c) { f(x); }

Workaround

There is no workaround at this time.

Fix Information

JavaScript parsing is fixed to avoid this issue.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips