Low
cacti — security advisory
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.
- Products
- cacti
- Affected versions
- 0.8.8b+dfsg-3, 0.8.8b+dfsg-5, 0.8.8b+dfsg-5ubuntu0.1, 0.8.8b+dfsg-5ubuntu0.2, 0.8.8b+dfsg-5ubuntu0.2+esm1, 0.8.8b+dfsg-5ubuntu0.2+esm2, 0.8.8f+ds1-2, 0.8.8f+ds1-3, 0.8.8f+ds1-4, 0.8.8f+ds1-4ubuntu1, 0.8.8f+ds1-4ubuntu2, 0.8.8f+ds1-4ubuntu3, 0.8.8f+ds1-4ubuntu4, 0.8.8f+ds1-4ubuntu4.16.04, 0.8.8f+ds1-4ubuntu4.16.04.1, 0.8.8f+ds1-4ubuntu4.16.04.2, 0.8.8f+ds1-4ubuntu4.16.04.2+esm1, 0.8.8f+ds1-4ubuntu4.16.04.2+esm2, 1.1.18+ds1-1, 1.1.27+ds1-2, 1.1.27+ds1-3, 1.1.28+ds1-2, 1.1.35+ds1-1, 1.1.36+ds1-1, 1.1.38+ds1-1, 1.1.38+ds1-1ubuntu0.1~esm1, 1.1.38+ds1-1ubuntu0.1~esm3, 1.1.38+ds1-1ubuntu0.1~esm4, 1.2.10+ds1-1ubuntu1, 1.2.10+ds1-1ubuntu1+esm1, 1.2.10+ds1-1ubuntu1.1, 1.2.10+ds1-1ubuntu1.1+esm1, 1.2.10+ds1-1ubuntu1.1+esm2, 1.2.16+ds1-2ubuntu1, 1.2.19+ds1-2ubuntu1, 1.2.19+ds1-2ubuntu1+esm1, 1.2.19+ds1-2ubuntu1.1, 1.2.19+ds1-2ubuntu1.1+esm1, 1.2.19+ds1-2ubuntu1.1+esm2, 1.2.25+ds1-2, 1.2.26+ds1-1, 1.2.26+ds1-1ubuntu0.1, 1.2.28+ds1-4ubuntu1, 1.2.30+ds1-1ubuntu1, 1.2.30+ds1-1ubuntu2, 1.2.30+ds1-1ubuntu3, 1.2.31+ds1-3ubuntu2, 1.2.4+ds1-2ubuntu3, 1.2.9+ds1-1ubuntu1, 1.2.9+ds1-1ubuntu2
- Fixed versions
- Not specified
- CVEs
- CVE-2026-39894
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:10 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2026-39894
cacti
Fixed versions: Not specified
cacti
Fixed versions: Not specified
cacti
Fixed versions: Not specified
cacti
Fixed versions: Not specified
cacti
Fixed versions: Not specified
cacti
Fixed versions: Not specified
cacti
Fixed versions: Not specified
cacti
Fixed versions: Not specified
cacti
Fixed versions: Not specified
Complete source record
{
"id": "c0defda507e682758c6f27f0ffc678bb9ff17cc4b6b060b20d38362ddddd7159",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-39894",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-39894",
"summary": "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.",
"evidence": "osv:UBUNTU-CVE-2026-39894",
"products": [
{
"name": {
"value": "cacti",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.8.8b+dfsg-3",
"evidence": "/affected/0/versions"
},
{
"value": "0.8.8b+dfsg-5",
"evidence": "/affected/0/versions"
},
{
"value": "0.8.8b+dfsg-5ubuntu0.1",
"evidence": "/affected/0/versions"
},
{
"value": "0.8.8b+dfsg-5ubuntu0.2",
"evidence": "/affected/0/versions"
},
{
"value": "0.8.8b+dfsg-5ubuntu0.2+esm1",
"evidence": "/affected/0/versions"
},
{
"value": "0.8.8b+dfsg-5ubuntu0.2+esm2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "cacti",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.8.8f+ds1-2",
"evidence": "/affected/1/versions"
},
{
"value": "0.8.8f+ds1-3",
"evidence": "/affected/1/versions"
},
{
"value": "0.8.8f+ds1-4",
"evidence": "/affected/1/versions"
},
{
"value": "0.8.8f+ds1-4ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "0.8.8f+ds1-4ubuntu2",
"evidence": "/affected/1/versions"
},
{
"value": "0.8.8f+ds1-4ubuntu3",
"evidence": "/affected/1/versions"
},
{
"value": "0.8.8f+ds1-4ubuntu4",
"evidence": "/affected/1/versions"
},
{
"value": "0.8.8f+ds1-4ubuntu4.16.04",
"evidence": "/affected/1/versions"
},
{
"value": "0.8.8f+ds1-4ubuntu4.16.04.1",
"evidence": "/affected/1/versions"
},
{
"value": "0.8.8f+ds1-4ubuntu4.16.04.2",
"evidence": "/affected/1/versions"
},
{
"value": "0.8.8f+ds1-4ubuntu4.16.04.2+esm1",
"evidence": "/affected/1/versions"
},
{
"value": "0.8.8f+ds1-4ubuntu4.16.04.2+esm2",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "cacti",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.1.18+ds1-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.1.27+ds1-2",
"evidence": "/affected/2/versions"
},
{
"value": "1.1.27+ds1-3",
"evidence": "/affected/2/versions"
},
{
"value": "1.1.28+ds1-2",
"evidence": "/affected/2/versions"
},
{
"value": "1.1.35+ds1-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.1.36+ds1-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.1.38+ds1-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.1.38+ds1-1ubuntu0.1~esm1",
"evidence": "/affected/2/versions"
},
{
"value": "1.1.38+ds1-1ubuntu0.1~esm3",
"evidence": "/affected/2/versions"
},
{
"value": "1.1.38+ds1-1ubuntu0.1~esm4",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "cacti",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.2.4+ds1-2ubuntu3",
"evidence": "/affected/3/versions"
},
{
"value": "1.2.9+ds1-1ubuntu1",
"evidence": "/affected/3/versions"
},
{
"value": "1.2.9+ds1-1ubuntu2",
"evidence": "/affected/3/versions"
},
{
"value": "1.2.10+ds1-1ubuntu1",
"evidence": "/affected/3/versions"
},
{
"value": "1.2.10+ds1-1ubuntu1+esm1",
"evidence": "/affected/3/versions"
},
{
"value": "1.2.10+ds1-1ubuntu1.1",
"evidence": "/affected/3/versions"
},
{
"value": "1.2.10+ds1-1ubuntu1.1+esm1",
"evidence": "/affected/3/versions"
},
{
"value": "1.2.10+ds1-1ubuntu1.1+esm2",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "cacti",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.2.16+ds1-2ubuntu1",
"evidence": "/affected/4/versions"
},
{
"value": "1.2.19+ds1-2ubuntu1",
"evidence": "/affected/4/versions"
},
{
"value": "1.2.19+ds1-2ubuntu1+esm1",
"evidence": "/affected/4/versions"
},
{
"value": "1.2.19+ds1-2ubuntu1.1",
"evidence": "/affected/4/versions"
},
{
"value": "1.2.19+ds1-2ubuntu1.1+esm1",
"evidence": "/affected/4/versions"
},
{
"value": "1.2.19+ds1-2ubuntu1.1+esm2",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "cacti",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.2.25+ds1-2",
"evidence": "/affected/5/versions"
},
{
"value": "1.2.26+ds1-1",
"evidence": "/affected/5/versions"
},
{
"value": "1.2.26+ds1-1ubuntu0.1",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "cacti",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.2.28+ds1-4ubuntu1",
"evidence": "/affected/6/versions"
},
{
"value": "1.2.30+ds1-1ubuntu1",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "cacti",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.2.30+ds1-1ubuntu2",
"evidence": "/affected/7/versions"
},
{
"value": "1.2.30+ds1-1ubuntu3",
"evidence": "/affected/7/versions"
},
{
"value": "1.2.31+ds1-3ubuntu2",
"evidence": "/affected/7/versions"
}
]
},
{
"name": {
"value": "cacti",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.2.30+ds1-1ubuntu1",
"evidence": "/affected/8/versions"
},
{
"value": "1.2.30+ds1-1ubuntu2",
"evidence": "/affected/8/versions"
}
]
}
],
"severity": "low",
"structured": {
"id": "UBUNTU-CVE-2026-39894",
"aliases": [
"UBUNTU-CVE-2026-39894"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cacti",
"purl": "pkg:deb/ubuntu/cacti?arch=source&distro=esm-infra-legacy%2Ftrusty",
"ecosystem": "Ubuntu:Pro:14.04:LTS"
},
"versions": [
"0.8.8b+dfsg-3",
"0.8.8b+dfsg-5",
"0.8.8b+dfsg-5ubuntu0.1",
"0.8.8b+dfsg-5ubuntu0.2",
"0.8.8b+dfsg-5ubuntu0.2+esm1",
"0.8.8b+dfsg-5ubuntu0.2+esm2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-39894.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "cacti",
"binary_version": "0.8.8b+dfsg-5ubuntu0.2+esm2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cacti",
"purl": "pkg:deb/ubuntu/cacti?arch=source&distro=esm-apps%2Fxenial",
"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"versions": [
"0.8.8f+ds1-2",
"0.8.8f+ds1-3",
"0.8.8f+ds1-4",
"0.8.8f+ds1-4ubuntu1",
"0.8.8f+ds1-4ubuntu2",
"0.8.8f+ds1-4ubuntu3",
"0.8.8f+ds1-4ubuntu4",
"0.8.8f+ds1-4ubuntu4.16.04",
"0.8.8f+ds1-4ubuntu4.16.04.1",
"0.8.8f+ds1-4ubuntu4.16.04.2",
"0.8.8f+ds1-4ubuntu4.16.04.2+esm1",
"0.8.8f+ds1-4ubuntu4.16.04.2+esm2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-39894.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "cacti",
"binary_version": "0.8.8f+ds1-4ubuntu4.16.04.2+esm2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cacti",
"purl": "pkg:deb/ubuntu/cacti?arch=source&distro=esm-apps%2Fbionic",
"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
"versions": [
"1.1.18+ds1-1",
"1.1.27+ds1-2",
"1.1.27+ds1-3",
"1.1.28+ds1-2",
"1.1.35+ds1-1",
"1.1.36+ds1-1",
"1.1.38+ds1-1",
"1.1.38+ds1-1ubuntu0.1~esm1",
"1.1.38+ds1-1ubuntu0.1~esm3",
"1.1.38+ds1-1ubuntu0.1~esm4"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-39894.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "cacti",
"binary_version": "1.1.38+ds1-1ubuntu0.1~esm4"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cacti",
"purl": "pkg:deb/ubuntu/cacti?arch=source&distro=esm-apps%2Ffocal",
"ecosystem": "Ubuntu:Pro:20.04:LTS"
},
"versions": [
"1.2.4+ds1-2ubuntu3",
"1.2.9+ds1-1ubuntu1",
"1.2.9+ds1-1ubuntu2",
"1.2.10+ds1-1ubuntu1",
"1.2.10+ds1-1ubuntu1+esm1",
"1.2.10+ds1-1ubuntu1.1",
"1.2.10+ds1-1ubuntu1.1+esm1",
"1.2.10+ds1-1ubuntu1.1+esm2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-39894.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "cacti",
"binary_version": "1.2.10+ds1-1ubuntu1.1+esm2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cacti",
"purl": "pkg:deb/ubuntu/cacti?arch=source&distro=esm-apps%2Fjammy",
"ecosystem": "Ubuntu:Pro:22.04:LTS"
},
"versions": [
"1.2.16+ds1-2ubuntu1",
"1.2.19+ds1-2ubuntu1",
"1.2.19+ds1-2ubuntu1+esm1",
"1.2.19+ds1-2ubuntu1.1",
"1.2.19+ds1-2ubuntu1.1+esm1",
"1.2.19+ds1-2ubuntu1.1+esm2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-39894.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "cacti",
"binary_version": "1.2.19+ds1-2ubuntu1.1+esm2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cacti",
"purl": "pkg:deb/ubuntu/cacti?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"1.2.25+ds1-2",
"1.2.26+ds1-1",
"1.2.26+ds1-1ubuntu0.1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-39894.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "cacti",
"binary_version": "1.2.26+ds1-1ubuntu0.1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cacti",
"purl": "pkg:deb/ubuntu/cacti?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"1.2.28+ds1-4ubuntu1",
"1.2.30+ds1-1ubuntu1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-39894.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "cacti",
"binary_version": "1.2.30+ds1-1ubuntu1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cacti",
"purl": "pkg:deb/ubuntu/cacti?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"1.2.30+ds1-1ubuntu2",
"1.2.30+ds1-1ubuntu3",
"1.2.31+ds1-3ubuntu2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-39894.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "cacti",
"binary_version": "1.2.31+ds1-3ubuntu2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cacti",
"purl": "pkg:deb/ubuntu/cacti?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"1.2.30+ds1-1ubuntu1",
"1.2.30+ds1-1ubuntu2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-39894.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "cacti",
"binary_version": "1.2.30+ds1-1ubuntu2"
}
]
}
}
],
"modified": "2026-10-17T12:58:13.327694560Z",
"provider": "osv",
"upstream": [
"CVE-2026-39894"
],
"references": [
"https://ubuntu.com/security/CVE-2026-39894",
"https://www.cve.org/CVERecord?id=CVE-2026-39894",
"https://github.com/Cacti/cacti/security/advisories/GHSA-23g4-vf2j-94w4",
"https://github.com/Cacti/cacti/issues/7011",
"https://github.com/Cacti/cacti/commit/d2a698854956e9e4e53da9eab5b5719ae40e6893"
]
},
"related_cves": [
{
"value": "CVE-2026-39894",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 358368,
"published_at": "2026-06-24T22:16:00+00:00"
}