Bug ID 678931: Portal Access: incorrect Microsoft IE emulation mode may be used if it is set by <META> tag

Last Modified: May 29, 2024

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

Known Affected Versions:
11.6.0, 11.6.1, 11.6.2, 11.6.3,,,,, 11.6.4, 11.6.5,,,, 13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 13.1.5,, 14.0.0,,,,,, 14.0.1,, 14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3,, 14.1.4,,,,,,, 14.1.5,,,,,

Opened: Aug 16, 2017

Severity: 3-Major


Microsoft Internet Explorer may use several emulation modes for HTML pages. The mode can be set by special <META> tag inside the page. This tag may be preceded by another tags with URLs, for example, <LINK> tags. Portal Access inserts auxiliary <SCRIPT> tags before <LINK> tag if this has not been done before. Internet Explorer ignores <META> tags with emulation mode setting after <SCRIPT> tags.


Wrong emulation mode is used for this HTML page in Internet Explorer. This may lead to incorrect behavior of Web application.


- Microsoft Internet Explorer - HTML page with <META http-equiv="X-UA-Compatible" ...> tag and <LINK> tag before this <META> tag


Use iRule to move <META http-equiv="X-UA-Compatible" ...> tag in front of any <LINK> tags.

Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips