CVE-2026-85749
Dashboard / Vulnerabilities / CVE-2026-85749
Summary: MailWatch: IDOR lets any authenticated user release or delete another tenant's quarantined mail
Details: MailWatch for MailScanner is a web-based front-end to MailScanner. Prior to 1.2.27, any authenticated MailWatch user, including the U/user, D/domain-admin, and H/host roles, can release to inbox or permanently delete the quarantined mail of any other user or domain by supplying an arbitrary message `id` to `mailscanner/quarantine_action.php`. The action path calls `quarantine_list_items()` in `mailscanner/functions.php`, which selects from `maillog` by the supplied identifier without the per-role `global_filter` applied by listing and read views. The action requires a valid session and CSRF token, but the caller can submit a token from the caller's own session; ownership of the requested message is never checked. Message identifiers are enumerable, allowing a low-privilege user to invoke `quarantine_release()` or `quarantine_delete()` for other users' or domains' quarantined messages, force-delivering mail held by the quarantine or permanently deleting it. This issue is fixed in version 1.2.27.
References: https://github.com/mailwatch/MailWatch/releases/tag/v1.2.27, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85749.json, https://github.com/mailwatch/MailWatch/security/advisories/GHSA-w7v5-7g6w-87r4, https://nvd.nist.gov/vuln/detail/CVE-2026-85749, https://github.com/mailwatch/MailWatch/commit/bc04f25eb0cec028cbd4ded9c049cfc6f663a15f
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