CVE-2026-61910Low· 3.5▾ SunlitAn 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 annot…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 19.3 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Sep 11.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.2%
Last analysed / modified upstream
0.2% → 0.2%
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.)
imap < 3.8.8imap >= 3.9.0, < 3.10.4imap >= 3.11.0, < 3.12.4Upgrade past the affected range:
imap 3.12.4Connected by shared product, vendor, weakness, or advisory.
CVE-2026-61915Medium· 4.2An issue was discovered in Cyrus IMAP before 3.12.4
CVE-2026-61909Low· 3.5An issue was discovered in Cyrus IMAP before 3.12.4
CVE-2026-61908Low· 3.1An issue was discovered in Cyrus IMAP before 3.12.4
CVE-2026-61911Medium· 4.3An issue was discovered in Cyrus IMAP before 3.12.4
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