CVE-2026-39894

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-39894
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-39894.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-39894
Aliases
  • GHSA-23g4-vf2j-94w4
Downstream
Published
2026-06-24T21:55:49Z
Modified
2026-08-12T03:51:32Z
Severity
  • 2.9 (Low) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
Summary
Cacti: RRDtool metric shift via LC_NUMERIC locale comma decimal formatting
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-474"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39894.json"
}
References

Affected packages

Git / github.com/cacti/cacti

Affected ranges

Type
GIT
Repo
https://github.com/cacti/cacti
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
1e8eaca26b84b128c39ce8cc8ece42d7ff76aac1
Fixed
d2a698854956e9e4e53da9eab5b5719ae40e6893
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:cacti:cacti:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.2.31"
        }
    ],
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

releaes/1.*
releaes/1.2.19
release/1.*
release/1.0.0
release/1.0.1
release/1.0.2
release/1.0.3
release/1.0.4
release/1.0.5
release/1.0.6
release/1.1.0
release/1.1.1
release/1.1.11
release/1.1.12
release/1.1.13
release/1.1.14
release/1.1.15
release/1.1.16
release/1.1.17
release/1.1.18
release/1.1.19
release/1.1.2
release/1.1.20
release/1.1.21
release/1.1.22
release/1.1.23
release/1.1.24
release/1.1.25
release/1.1.26
release/1.1.27
release/1.1.28
release/1.1.29
release/1.1.3
release/1.1.30
release/1.1.31
release/1.1.32
release/1.1.33
release/1.1.34
release/1.1.35
release/1.1.36
release/1.1.37
release/1.1.38
release/1.1.4
release/1.1.5
release/1.1.6
release/1.1.7
release/1.1.8
release/1.2.0
release/1.2.1
release/1.2.10
release/1.2.11
release/1.2.12
release/1.2.13
release/1.2.14
release/1.2.15
release/1.2.16
release/1.2.17
release/1.2.18
release/1.2.19
release/1.2.2
release/1.2.20
release/1.2.21
release/1.2.22
release/1.2.23
release/1.2.24
release/1.2.25
release/1.2.26
release/1.2.27
release/1.2.28
release/1.2.29
release/1.2.3
release/1.2.30
release/1.2.4
release/1.2.5
release/1.2.6
release/1.2.7
release/1.2.8
release/1.2.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-39894.json"