DEBIAN-CVE-2026-39894
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.
DEBIAN-CVE-2026-39894
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-39894
cacti
Source reference: /affected/0/package/name
- Affected versions
- 1.2.24+ds1-1
Source reference:
/affected/0/versions1.2.24+ds1-1+deb12u1Source reference:
/affected/0/versions1.2.24+ds1-1+deb12u2Source reference:
/affected/0/versions1.2.24+ds1-1+deb12u3Source reference:
/affected/0/versions1.2.24+ds1-1+deb12u4Source reference:
/affected/0/versions1.2.24+ds1-1+deb12u5Source reference:
/affected/0/versions1.2.25+ds1-1Source reference:
/affected/0/versions1.2.25+ds1-2Source reference:
/affected/0/versions1.2.26+ds1-1Source reference:
/affected/0/versions1.2.27+ds1-1Source reference:
/affected/0/versions1.2.27+ds1-2Source reference:
/affected/0/versions1.2.28+ds1-1Source reference:
/affected/0/versions1.2.28+ds1-2Source reference:
/affected/0/versions1.2.28+ds1-3Source reference:
/affected/0/versions1.2.28+ds1-4Source reference:
/affected/0/versions1.2.30+ds1-1Source reference:
/affected/0/versions1.2.30+ds1-2Source reference:
/affected/0/versions1.2.30+ds1-3Source reference:
/affected/0/versions1.2.31+ds1-1Source reference:
/affected/0/versions1.2.31+ds1-2Source reference:
/affected/0/versions1.2.31+ds1-3Source reference:
/affected/0/versions1.2.31+ds1-4Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
cacti
Source reference: /affected/1/package/name
- Affected versions
- 1.2.30+ds1-1
Source reference:
/affected/1/versions1.2.30+ds1-2Source reference:
/affected/1/versions1.2.30+ds1-3Source reference:
/affected/1/versions1.2.31+ds1-1Source reference:
/affected/1/versions1.2.31+ds1-2Source reference:
/affected/1/versions1.2.31+ds1-3Source reference:
/affected/1/versions1.2.31+ds1-4Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
cacti
Source reference: /affected/2/package/name
- Affected versions
- 1.2.30+ds1-1
Source reference:
/affected/2/versions1.2.30+ds1-2Source reference:
/affected/2/versions1.2.30+ds1-3Source reference:
/affected/2/versions - Fixed versions
- 1.2.31+ds1-1
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cacti",
"purl": "pkg:deb/debian/cacti?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1.2.24+ds1-1",
"1.2.24+ds1-1+deb12u1",
"1.2.24+ds1-1+deb12u2",
"1.2.24+ds1-1+deb12u3",
"1.2.24+ds1-1+deb12u4",
"1.2.24+ds1-1+deb12u5",
"1.2.25+ds1-1",
"1.2.25+ds1-2",
"1.2.26+ds1-1",
"1.2.27+ds1-1",
"1.2.27+ds1-2",
"1.2.28+ds1-1",
"1.2.28+ds1-2",
"1.2.28+ds1-3",
"1.2.28+ds1-4",
"1.2.30+ds1-1",
"1.2.30+ds1-2",
"1.2.30+ds1-3",
"1.2.31+ds1-1",
"1.2.31+ds1-2",
"1.2.31+ds1-3",
"1.2.31+ds1-4"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-39894.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cacti",
"purl": "pkg:deb/debian/cacti?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1.2.30+ds1-1",
"1.2.30+ds1-2",
"1.2.30+ds1-3",
"1.2.31+ds1-1",
"1.2.31+ds1-2",
"1.2.31+ds1-3",
"1.2.31+ds1-4"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-39894.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.2.31+ds1-1"
}
]
}
],
"package": {
"name": "cacti",
"purl": "pkg:deb/debian/cacti?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.2.30+ds1-1",
"1.2.30+ds1-2",
"1.2.30+ds1-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-39894.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #56415 · Revision 1
- Added to Heist Feed
- Publisher date