2.9

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 rrdtool_function_update() can corrupt RRDtool metric values. The rrdtool_function_update() function checks metric values with is_numeric() and concatenates them into the RRDtool update command via PHP string interpolation. PHP's string cast of floats is locale-sensitive: if LC_NUMERIC uses comma as decimal separator (e.g., de_DE), a value of 1.5 becomes "1,5". RRDtool expects . as decimal separator, causing metric data to shift into wrong columns or be silently dropped. No setlocale() reset is present in the update path. This causes a data integrity issue, but is not remotely exploitable; it requires server locale misconfiguration. The issue has been fixed in version 1.2.31.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Cacti ≫ Cacti Version < 1.2.31
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.1% 0.012
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 2.5 1 1.4
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
security-advisories@github.com 2.9 1.4 1.4
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
CWE-474 Use of Function with Inconsistent Implementations

The code uses a function that has inconsistent implementations across operating systems and versions.

https://github.com/Cacti/cacti/commit/d2a698854956e9e4e53da9eab5b5719ae40e6893
Patch
https://github.com/Cacti/cacti/issues/7011
Patch
Issue Tracking
https://github.com/Cacti/cacti/security/advisories/GHSA-23g4-vf2j-94w4
Vendor Advisory