{"id":"CVE-2026-107175","summary":"MISP Correlation Engine Fails to Refresh When Event Distribution or Sharing Group Changes","details":"MISP contains a defect in its event save workflow that prevents the correlation engine from recalculating correlations when an event's distribution level or sharing group is modified.\n\nWhen a user edits an existing event and changes its distribution or sharing_group_id, the internal before-save hook stored the incoming (new) data rather than the previously persisted values. As a result, the after-save comparison that determines whether a correlation refresh is needed never detected the change, and stale correlations persisted.\n\nSecurity impact:\n\n- Stale correlations may continue to expose event data to users in a broader sharing group after the event has been moved to a more restrictive group, resulting in unintended information disclosure.\n\n- Conversely, newly relevant correlations may not appear after a distribution widening, degrading the completeness of threat intelligence sharing.\n\nPreconditions:\n\n- An authenticated user with write access to at least one MISP event.\n\n- The user modifies the event's distribution or sharing_group_id field.\n\nAffected versions: \u003c2.5.48","modified":"2026-10-09T02:49:20.770164193Z","published":"2026-10-07T12:38:44.252Z","database_specific":{"cwe_ids":["CWE-284","CWE-665"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107175.json","cna_assigner":"CIRCL"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107175.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-107175"},{"type":"FIX","url":"https://github.com/MISP/MISP/commit/19a389d19"},{"type":"PACKAGE","url":"https://github.com/MISP/MISP"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/misp/misp","events":[{"introduced":"0"},{"fixed":"19a389d19"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"2.5.48"}]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-107175.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N"}]}