{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-39894",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-04-07T20:32:03.011Z",
        "datePublished": "2026-06-24T21:55:49.857Z",
        "dateUpdated": "2026-06-25T13:02:42.706Z"
    },
    "containers": {
        "cna": {
            "title": "Cacti: RRDtool metric shift via LC_NUMERIC locale comma decimal formatting",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-474",
                            "lang": "en",
                            "description": "CWE-474: Use of Function with Inconsistent Implementations",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "LOCAL",
                        "availabilityImpact": "NONE",
                        "baseScore": 2.9,
                        "baseSeverity": "LOW",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "LOW",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/Cacti/cacti/security/advisories/GHSA-23g4-vf2j-94w4",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/Cacti/cacti/security/advisories/GHSA-23g4-vf2j-94w4"
                },
                {
                    "name": "https://github.com/Cacti/cacti/issues/7011",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/Cacti/cacti/issues/7011"
                },
                {
                    "name": "https://github.com/Cacti/cacti/commit/d2a698854956e9e4e53da9eab5b5719ae40e6893",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/Cacti/cacti/commit/d2a698854956e9e4e53da9eab5b5719ae40e6893"
                }
            ],
            "affected": [
                {
                    "vendor": "Cacti",
                    "product": "cacti",
                    "versions": [
                        {
                            "version": "< 1.2.31",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-06-24T21:55:49.857Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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."
                }
            ],
            "source": {
                "advisory": "GHSA-23g4-vf2j-94w4",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-06-25T13:02:29.458961Z",
                                "id": "CVE-2026-39894",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-06-25T13:02:42.706Z"
                }
            }
        ]
    }
}