CVE-2026-8406 high vulnerability summary
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/S...
CVE-2026-8406 is listed by Tenable as a High severity CVE. The issue should be reviewed by teams that operate the affected software or dependencies.
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.
Recommended action
Confirm whether the affected product or library is present in your environment, review the vendor guidance, and apply the available update or mitigation where applicable.
This brief is based on information from Tenable Newest CVEs . Please refer to the original source for the complete advisory and vendor-specific guidance.
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