{"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"}}]}}