{"id":"CVE-2026-104912","aliases":["EUVD-2026-91751","GHSA-w4mw-2637-h8xp"],"status":"published","title":"MISP Correlation Authorization Bypass Exposes Restricted Event and Attribute Data","description":"MISP contains an authorization flaw in its correlation handling during attribute searches. When a user performs an attribute search that triggers correlation lookups, the system authorized access to correlated attributes and events based on a stale distribution snapshot stored on the correlation row rather than the live event access control list.\n\nBecause the correlation row's distribution columns are a point-in-time copy that lacks a published flag, the authorization check becomes incorrect when an event is subsequently restricted (for example, its sharing group is changed or it is unpublished). As a result, an authenticated user could retrieve attributes and event details belonging to events they no longer have permission to view.\n\nPreconditions:\n\n- An authenticated user with at least read access to some events in the instance.\n\n- The existence of correlations between events, at least one of which has been restricted after the correlation was created.\n\nImpact:\n\n- Confidentiality: exposure of attribute values and event metadata that the user is not authorized to access.\n\nAffected versions: MISP prior to v2.5.48.","severity":{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00207,"percentile":0.10911,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-284","CWE-862"],"published":"2026-10-02T16:04:50Z","modified":"2026-10-28T02:30:27Z","products":[{"vendor":"misp","product":"misp"}],"references":[{"url":"https://github.com/MISP/MISP/commit/100235bd9","tags":["patch","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-104912","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-w4mw-2637-h8xp"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104912.json","tags":["advisory"]},{"url":"https://github.com/MISP/MISP","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-104912","title":"MISP Correlation Authorization Bypass Exposes Restricted Event and Attribute Data","description":"MISP contains an authorization flaw in its correlation handling during attribute searches. When a user performs an attribute search that triggers correlation lookups, the system authorized access to correlated attributes and events based on a stale distribution snapshot stored on the correlation row rather than the live event access control list.\n\nBecause the correlation row's distribution columns are a point-in-time copy that lacks a published flag, the authorization check becomes incorrect when an event is subsequently restricted (for example, its sharing group is changed or it is unpublished). As a result, an authenticated user could retrieve attributes and event details belonging to events they no longer have permission to view.\n\nPreconditions:\n\n- An authenticated user with at least read access to some events in the instance.\n\n- The existence of correlations between events, at least one of which has been restricted after the correlation was created.\n\nImpact:\n\n- Confidentiality: exposure of attribute values and event metadata that the user is not authorized to access.\n\nAffected versions: MISP prior to v2.5.48.","status":"published","published":"2026-10-02T16:04:50.58Z","modified":"2026-10-03T15:52:55.841Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-862","CWE-284"],"updated_at":"2026-11-02T14:20:09.448255Z"}],"euvd":[{"id":"EUVD-2026-91751","description":"MISP contains an authorization flaw in its correlation handling during attribute searches. When a user performs an attribute search that triggers correlation lookups, the system authorized access to correlated attributes and events based on a stale distribution snapshot stored on the correlation row rather than the live event access control list.\n\nBecause the correlation row's distribution columns are a point-in-time copy that lacks a published flag, the authorization check becomes incorrect when an event is subsequently restricted (for example, its sharing group is changed or it is unpublished). As a result, an authenticated user could retrieve attributes and event details belonging to events they no longer have permission to view.\n\nPreconditions:\n\n- An authenticated user with at least read access to some events in the instance.\n\n- The existence of correlations between events, at least one of which has been restricted after the correlation was created.\n\nImpact:\n\n- Confidentiality: exposure of attribute values and event metadata that the user is not authorized to access.\n\nAffected versions: MISP prior to v2.5.48.","status":"published","published":"2026-10-02T16:04:50Z","modified":"2026-10-03T15:52:55Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T17:27:40.640907Z"}],"ghsa":[{"id":"GHSA-w4mw-2637-h8xp","title":"MISP contains an authorization flaw in its correlation handling during attribute searches. When a...","description":"MISP contains an authorization flaw in its correlation handling during attribute searches. When a user performs an attribute search that triggers correlation lookups, the system authorized access to correlated attributes and events based on a stale distribution snapshot stored on the correlation row rather than the live event access control list.\n\nBecause the correlation row's distribution columns are a point-in-time copy that lacks a published flag, the authorization check becomes incorrect when an event is subsequently restricted (for example, its sharing group is changed or it is unpublished). As a result, an authenticated user could retrieve attributes and event details belonging to events they no longer have permission to view.\n\nPreconditions:\n\n- An authenticated user with at least read access to some events in the instance.\n\n- The existence of correlations between events, at least one of which has been restricted after the correlation was created.\n\nImpact:\n\n- Confidentiality: exposure of attribute values and event metadata that the user is not authorized to access.\n\nAffected versions: MISP prior to v2.5.48.","status":"published","published":"2026-10-02T18:31:27Z","modified":"2026-10-02T18:31:36Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T15:12:43.646433Z"}],"nvd":[{"id":"CVE-2026-104912","description":"MISP contains an authorization flaw in its correlation handling during attribute searches. When a user performs an attribute search that triggers correlation lookups, the system authorized access to correlated attributes and events based on a stale distribution snapshot stored on the correlation row rather than the live event access control list.\n\nBecause the correlation row's distribution columns are a point-in-time copy that lacks a published flag, the authorization check becomes incorrect when an event is subsequently restricted (for example, its sharing group is changed or it is unpublished). As a result, an authenticated user could retrieve attributes and event details belonging to events they no longer have permission to view.\n\nPreconditions:\n\n- An authenticated user with at least read access to some events in the instance.\n\n- The existence of correlations between events, at least one of which has been restricted after the correlation was created.\n\nImpact:\n\n- Confidentiality: exposure of attribute values and event metadata that the user is not authorized to access.\n\nAffected versions: MISP prior to v2.5.48.","status":"published","published":"2026-10-02T16:16:49.047Z","modified":"2026-10-03T16:16:35Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"}],"cwes":["CWE-284","CWE-862"],"updated_at":"2026-11-02T14:12:53.75133Z"}],"osv":[{"id":"CVE-2026-104912","title":"MISP Correlation Authorization Bypass Exposes Restricted Event and Attribute Data","description":"MISP contains an authorization flaw in its correlation handling during attribute searches. When a user performs an attribute search that triggers correlation lookups, the system authorized access to correlated attributes and events based on a stale distribution snapshot stored on the correlation row rather than the live event access control list.\n\nBecause the correlation row's distribution columns are a point-in-time copy that lacks a published flag, the authorization check becomes incorrect when an event is subsequently restricted (for example, its sharing group is changed or it is unpublished). As a result, an authenticated user could retrieve attributes and event details belonging to events they no longer have permission to view.\n\nPreconditions:\n\n- An authenticated user with at least read access to some events in the instance.\n\n- The existence of correlations between events, at least one of which has been restricted after the correlation was created.\n\nImpact:\n\n- Confidentiality: exposure of attribute values and event metadata that the user is not authorized to access.\n\nAffected versions: MISP prior to v2.5.48.","status":"published","published":"2026-10-02T16:04:50.58Z","modified":"2026-10-28T02:30:27.982016854Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-284","CWE-862"],"updated_at":"2026-11-02T15:44:54.236592Z"}]}}