{"id":"CVE-2026-8406","aliases":["EUVD-2026-36245","GHSA-vgf3-fpxc-h968"],"status":"published","title":"openSIS Classic 9.3 - Insecure Direct Object Reference in Sent Mail","description":"openSIS Classic 9.3 contains an insecure direct object reference vulnerability in the messaging module. Any authenticated user with access to the messaging module can request sent-message details from modules/messaging/SentMail.php by supplying an arbitrary mail_id value.","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":"2026-11-10","score":0.00302,"percentile":0.23183,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-639"],"published":"2026-06-11T13:32:36Z","modified":"2026-10-28T02:31:07Z","products":[{"vendor":"os4ed","product":"opensis-classic"}],"references":[{"url":"https://fluidattacks.com/es/advisories/melanie","tags":["third-party-advisory","exploit","advisory"]},{"url":"https://github.com/OS4ED/openSIS-Classic/commit/c45d43146167324bae06bdf09de3e4bd2e5e478f","tags":["patch","fix"]},{"url":"https://github.com/OS4ED/openSIS-Classic","tags":["product","package"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-8406","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-vgf3-fpxc-h968"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8406.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-8406","title":"openSIS Classic 9.3 - Insecure Direct Object Reference in Sent Mail","description":"openSIS Classic 9.3 contains an insecure direct object reference vulnerability in the messaging module. Any authenticated user with access to the messaging module can request sent-message details from modules/messaging/SentMail.php by supplying an arbitrary mail_id value.","status":"published","published":"2026-06-11T13:32:36.738Z","modified":"2026-06-11T14:28:42.669Z","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-639"],"updated_at":"2026-11-02T13:48:13.398044Z"}],"euvd":[{"id":"EUVD-2026-36245","description":"openSIS Classic 9.3 contains an insecure direct object reference vulnerability in the messaging module. 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Any authenticated user with access to the messaging module can request sent-message details from modules/messaging/SentMail.php by supplying an arbitrary mail_id value.","status":"published","published":"2026-06-11T15:31:34Z","modified":"2026-06-11T15:31:45Z","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-639"],"updated_at":"2026-11-02T15:08:44.492605Z"}],"nvd":[{"id":"CVE-2026-8406","description":"openSIS Classic 9.3 contains an insecure direct object reference vulnerability in the messaging module. Any authenticated user with access to the messaging module can request sent-message details from modules/messaging/SentMail.php by supplying an arbitrary mail_id value.","status":"published","published":"2026-06-11T14:16:32.93Z","modified":"2026-10-26T11:10:00.157Z","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-639"],"updated_at":"2026-11-02T14:12:23.485267Z"}],"osv":[{"id":"CVE-2026-8406","title":"openSIS Classic 9.3 - Insecure Direct Object Reference in Sent Mail","description":"openSIS Classic 9.3 contains an insecure direct object reference vulnerability in the messaging module. Any authenticated user with access to the messaging module can request sent-message details from modules/messaging/SentMail.php by supplying an arbitrary mail_id value.","status":"published","published":"2026-06-11T13:32:36.738Z","modified":"2026-10-28T02:31:07.650783461Z","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-639"],"updated_at":"2026-11-02T15:45:18.482949Z"}]}}