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Cyrus IMAP · Vulnerability

CVSS 3.1 3.5 LOWCheck source for fixed versionsKEV status unknown

cve-program · CVE-2026-61910

Published

An issue was discovered in Cyrus IMAP before 3.12.4. Mailbox/set let a sharee change a special-use role on shared mailboxes. An authenticated user with maySetKeywords on another user's mailbox could change that mailbox's specialuse annotation. This could allow the sharee to change the shared mailbox to perform the archived, snoozed, or other role, which might cause mail mail to be written to the shared mailbox, sharing more content than intended. (This is likely to be an unusual situation, made more unusual because if the target already has an non-shared mailbox with that role, role duplication suppression will prevent the update.)

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Affected versions, risk and source history

Exploitation and risk

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23 Oct 2026 15:48:27 UTC

An issue was discovered in Cyrus IMAP before 3.12.4. Mailbox/set let a sharee change a special-use role on shared mailboxes. An authenticated user with maySetKeywords on another user's mailbox could change that mailbox's specialuse annotati…

cve-program · CVE-2026-61910 · Published

ChangeIntel

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Sources read 13 Nov 23:46 UTC · 274 of 275 readable · 270 fully read · documentation 469/469 current