{"id":"CVE-2026-72759","summary":"cti-transmute Conversion History Authorization Bypass Leads to Sensitive Data Disclosure After Conversion Deletion","details":"In affected versions of MISP cti-transmute, the conversion-history details endpoint performs an incomplete authorization check. When a history record references a deleted conversion, the associated conversion lookup returns None. The previous logic only denied access when the conversion object existed and the visibility check failed. As a result, deleted conversions bypassed the authorization check and their retained history input/output could be disclosed to a user able to request the corresponding history entry. The July 22, 2026 commit changes the logic to deny access whenever the conversion is missing or the requester lacks permission","modified":"2026-10-21T02:59:12.288975690Z","published":"2026-08-10T14:19:13.478Z","database_specific":{"cna_assigner":"CIRCL","cwe_ids":["CWE-862"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72759.json","unresolved_ranges":[{"extracted_events":[{"range":[{"last_affected":"1.4.0"}],"source":"AFFECTED_FIELD","strategy":"StandardRange"}]}]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72759.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72759"},{"type":"FIX","url":"https://github.com/MISP/cti-transmute/commit/88dc65f0117cf7a120f6252674c529e7b9c9b8c3"},{"type":"PACKAGE","url":"https://github.com/MISP/cti-transmute"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/misp/cti-transmute","events":[{"introduced":"0"},{"fixed":"88dc65f0117cf7a120f6252674c529e7b9c9b8c3"}],"database_specific":{"extracted_events":[{"source":"REFERENCES_COMMIT","range":[{"fixed":"88dc65f0117cf7a120f6252674c529e7b9c9b8c3"}]}]}}],"versions":["v1.4","v1.3"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72759.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"}]}