{"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"}}]}}

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