This should be already fixed in 4.3.26-2 (and upstream in 4.3.27):
xymon (4.3.26-2) unstable; urgency=high
* Apply upstream-suggested patch for multiple CGI related regressions in 4.3.26.
-- Axel Beckert <email address hidden> Fri, 04 Mar 2016 16:01:20 +0100
This should be already fixed in 4.3.26-2 (and upstream in 4.3.27):
xymon (4.3.26-2) unstable; urgency=high
* Apply upstream-suggested patch for multiple CGI related regressions in
4.3.26.
-- Axel Beckert <email address hidden> Fri, 04 Mar 2016 16:01:20 +0100