An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is an ESEARCH cross-user content oracle. By using the ESEARCH command, an authenticated IMAP user could enumerate folder names under any account they could name. Search would return UIDs of messages matching the search, creating a content oracle (without allowing arbitrary reads of the target's content).

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21368-1 advisory.

    Changes in cyrus-imapd:

    - Update to 3.8.7 (bugfix release)
    - CVE-2026-47081: XAPPLEPUSHSERVICE folder existence oracle and push hijack (bsc#1271617)
    - CVE-2026-47083: ESEARCH cross-user content oracle (bsc#1271619)
    - CVE-2026-47082: Vacation fcc skips destination-mailbox ACL (bsc#1271618)
    - CVE-2026-47084: LOCALDELETE bypassed ACL checks (bsc#1271620)
    - CVE-2026-47085: URLAUTH token forgery via missing mboxkey (bsc#1271621)
    - CVE-2026-47086: GENURLAUTH issued tokens bypassing ACLs (bsc#1271622)
    - CVE-2026-47087: URLAUTH does not honor revoked authorizer access (bsc#1271623)
    - CVE-2026-47088: Heap exposure in nested MIME comment parsing (bsc#1271624)
    - CVE-2026-47089: LISTRIGHTS not limited to users with admin access (bsc#1271625)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is an ESEARCH cross-user     content oracle. By using the ESEARCH command, an authenticated IMAP user could enumerate folder names     under any account they could name. Search would return UIDs of messages matching the search, creating a     content oracle (without allowing arbitrary reads of the target's content). (CVE-2026-47083)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
327811	openSUSE 16: cyradm / cyrus-imapd / cyrus-imapd-devel / cyrus-imapd-snmp / etc (openSUSE-SU-2026:21368-1)	Nessus	SuSE Local Security Checks	medium
327547	Linux Distros Unpatched Vulnerability : CVE-2026-47083	Nessus	Misc.	medium

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