{"cve":{"cve_id":"CVE-2026-39894","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":null,"epss_percentile":null,"epss_as_of":null,"description":"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.","published_at":"2026-06-24T21:55:49.857000Z","last_modified_at":null,"cvss_v3_score":2.9,"cvss_v3_vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","cvss_v3_severity":"LOW","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-474"],"nvd_references":["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"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-28T17:53:39.415886Z","updated_at":"2026-06-28T23:30:09.771414Z"},"effective_severity":"LOW","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"L","value_label":"Local"},{"metric":"AC","name":"Attack Complexity","value":"H","value_label":"High"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"L","value_label":"Low"},{"metric":"A","name":"Availability","value":"N","value_label":"None"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"cacti","vendor_name":"Cacti","product_slug":"cacti","product_name":"cacti","version_start":"< 1.2.31","version_start_inclusive":true,"version_end":"< 1.2.31","version_end_inclusive":true,"cpe23_uri":"cve5:cacti:cacti:< 1.2.31:< 1.2.31"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/Cacti/cacti/security/advisories/GHSA-23g4-vf2j-94w4","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://github.com/Cacti/cacti/issues/7011","source_type":"MISC","tags":[]},{"url":"https://github.com/Cacti/cacti/commit/d2a698854956e9e4e53da9eab5b5719ae40e6893","source_type":"PATCH","tags":["patch"]}],"timeline":[{"type":"published","at":"2026-06-24T21:55:49.857000Z","label":"CVE published","source":null}]}