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CVE-2026-61915

Medium priority
Needs evaluation

An issue was discovered in Cyrus IMAP before 3.12.4. There is a VPATCH BYPARAM double-free. An authenticated calendar user could crash a Cyrus CalDAV worker with a PATCH containing PATCH-ACTION="BYPARAM@..." against a resource...

1 affected package

cyrus-imapd

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
cyrus-imapd Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2026-61911

Medium priority
Needs evaluation

An issue was discovered in Cyrus IMAP before 3.12.4. There is a Sieve mailbox existence oracle. An authenticated user could install a Sieve script that probed whether another user's private mailbox existed, or read the value of...

1 affected package

cyrus-imapd

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
cyrus-imapd Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2026-61910

Medium priority
Needs evaluation

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...

1 affected package

cyrus-imapd

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
cyrus-imapd Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2026-61909

Medium priority
Needs evaluation

An issue was discovered in Cyrus IMAP before 3.12.4. CalDAV/CardDAV multiget bypasses a per-href ACL. An authenticated DAV user with some shared access to another user's calendar or address book could read even unshared events or...

1 affected package

cyrus-imapd

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
cyrus-imapd Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2026-61908

Medium priority
Needs evaluation

An issue was discovered in Cyrus IMAP before 3.12.4. A JMAP email-header blob ID can reference an out-of-bounds index. An authenticated user could attempt to download a crafted JMAP blob ID of the form H<emailid>-<index>, which...

1 affected package

cyrus-imapd

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
cyrus-imapd Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2026-61907

Medium priority
Needs evaluation

An issue was discovered in Cyrus IMAP before 3.12.4. JMAP snooze bypasses the destination-mailbox ACL. An authenticated user with insert permissions on another user's snoozed mailbox could cause insertion of mail to that user's...

1 affected package

cyrus-imapd

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
cyrus-imapd Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2026-47089

Medium priority
Needs evaluation

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. LISTRIGHTS os not limited to users with admin access. An authenticated user could call IMAP LISTRIGHTS against any mailbox they could name and learn what...

1 affected package

cyrus-imapd

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
cyrus-imapd Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2026-47088

Medium priority
Needs evaluation

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is heap exposure in nested MIME comment parsing. An authenticated IMAP user could craft an email message containing an RFC 822 comment ending with...

1 affected package

cyrus-imapd

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
cyrus-imapd Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2026-47087

Medium priority
Needs evaluation

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. URLAUTH does not honor revoked authorizer access. A URLAUTH URL minted while the authorizer had access continued to work after that access was revoked.

1 affected package

cyrus-imapd

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
cyrus-imapd Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2026-47086

Medium priority
Needs evaluation

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. GENURLAUTH-issued tokens can bypass ACLs. Any authenticated user could mint a URLAUTH token (via the GENURLAUTH command) for any mailbox they could name, even...

1 affected package

cyrus-imapd

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
cyrus-imapd Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
Show less packages