CVE-2026-39894 Cacti: RRDtool metric shift via LC_NUMERIC locale comma decimal formatting

Cacti is an open source performance and fault management framework. In versions 1.2.30 and below, the locale-dependent decimal formatting in rrdtoolfunctionupdate can corrupt RRDtool metric values. The rrdtoolfunctionupdate function checks metric values with isnumeric and concatenates them into t...