[CVE-2026-61915 ] Published: Sep 9, 2026, 8:18:36 PM UTC
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="BYPAR
High(7.1) Affected Details (6) 3.6.1-4+deb12u4 · amd64 · bookworm
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u4 · arm64 · bookworm
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · amd64 · bookworm-backports
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · arm64 · bookworm-backports
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · amd64 · bookworm-security
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · arm64 · bookworm-security
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
[CVE-2026-61911 ] Published: Sep 9, 2026, 8:18:36 PM UTC
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 ex
Medium(4.3) Affected Details (6) 3.6.1-4+deb12u4 · amd64 · bookworm
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u4 · arm64 · bookworm
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · amd64 · bookworm-backports
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · arm64 · bookworm-backports
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · amd64 · bookworm-security
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · arm64 · bookworm-security
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
[CVE-2026-61910 ] Published: Sep 9, 2026, 8:18:36 PM 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 c
Medium(5) Affected Details (6) 3.6.1-4+deb12u4 · amd64 · bookworm
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u4 · arm64 · bookworm
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · amd64 · bookworm-backports
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · arm64 · bookworm-backports
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · amd64 · bookworm-security
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · arm64 · bookworm-security
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
[CVE-2026-61909 ] Published: Sep 9, 2026, 8:18:36 PM UTC
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
Medium(5) Affected Details (6) 3.6.1-4+deb12u4 · amd64 · bookworm
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u4 · arm64 · bookworm
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · amd64 · bookworm-backports
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · arm64 · bookworm-backports
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · amd64 · bookworm-security
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · arm64 · bookworm-security
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
[CVE-2026-61908 ] Published: Sep 9, 2026, 8:18:36 PM UTC
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 for
Medium(6.5) Affected Details (6) 3.6.1-4+deb12u4 · amd64 · bookworm
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u4 · arm64 · bookworm
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · amd64 · bookworm-backports
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · arm64 · bookworm-backports
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · amd64 · bookworm-security
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · arm64 · bookworm-security
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
[CVE-2026-61907 ] Published: Sep 9, 2026, 8:02:56 AM UTC
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 inser
Medium(4.3) Affected Details (6) 3.6.1-4+deb12u4 · amd64 · bookworm
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u4 · arm64 · bookworm
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · amd64 · bookworm-backports
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · arm64 · bookworm-backports
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · amd64 · bookworm-security
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · arm64 · bookworm-security
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
[CVE-2026-47081 ] Published: Jul 16, 2026, 12:00:00 AM UTC
An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is an XAPPLEPUSHSERVICE folder existence oracle and push hijack. An authenticated IMAP user could probe for the existence of
Low(3.1) Affected Details (6) 3.6.1-4+deb12u4 · amd64 · bookworm
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u4 · arm64 · bookworm
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · amd64 · bookworm-backports
Fixed · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · arm64 · bookworm-backports
Fixed · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · amd64 · bookworm-security
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · arm64 · bookworm-security
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
[CVE-2026-47082 ] Published: Jul 16, 2026, 12:00:00 AM UTC
An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. The vacation "fcc" feature skips the destination-mailbox ACL. A user whose vacation Sieve script used :fcc (to save a copy of the s
Medium(5.4) Affected Details (6) 3.6.1-4+deb12u4 · amd64 · bookworm
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u4 · arm64 · bookworm
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · amd64 · bookworm-backports
Fixed · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · arm64 · bookworm-backports
Fixed · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · amd64 · bookworm-security
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · arm64 · bookworm-security
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
[CVE-2026-47083 ] Published: Jul 16, 2026, 12:00:00 AM UTC
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 name
Medium(4.3) Affected Details (6) 3.6.1-4+deb12u4 · amd64 · bookworm
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u4 · arm64 · bookworm
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · amd64 · bookworm-backports
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · arm64 · bookworm-backports
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · amd64 · bookworm-security
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · arm64 · bookworm-security
Affected
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
[CVE-2026-47084 ] Published: Jul 16, 2026, 12:00:00 AM UTC
An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. The LOCALDELETE command bypassed ACL checks. An authenticated but non-admin user could invoke the admin-only LOCALDELETE IMAP comma
Medium(6.5) Affected Details (6) 3.6.1-4+deb12u4 · amd64 · bookworm
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u4 · arm64 · bookworm
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · amd64 · bookworm-backports
Fixed · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · arm64 · bookworm-backports
Fixed · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · amd64 · bookworm-security
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · arm64 · bookworm-security
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
[CVE-2026-47085 ] Published: Jul 16, 2026, 12:00:00 AM UTC
An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. URLAUTH token forgery can occur via a missing mboxkey. If an attacker knew a folder name on the victim's account for which the vict
Medium(4) Affected Details (6) 3.6.1-4+deb12u4 · amd64 · bookworm
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u4 · arm64 · bookworm
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · amd64 · bookworm-backports
Fixed · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · arm64 · bookworm-backports
Fixed · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · amd64 · bookworm-security
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · arm64 · bookworm-security
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
[CVE-2026-47086 ] Published: Jul 16, 2026, 12:00:00 AM UTC
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 ma
Medium(4.3) Affected Details (6) 3.6.1-4+deb12u4 · amd64 · bookworm
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u4 · arm64 · bookworm
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · amd64 · bookworm-backports
Fixed · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · arm64 · bookworm-backports
Fixed · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · amd64 · bookworm-security
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · arm64 · bookworm-security
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
[CVE-2026-47087 ] Published: Jul 16, 2026, 12:00:00 AM UTC
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
Low(3.5) Affected Details (6) 3.6.1-4+deb12u4 · amd64 · bookworm
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u4 · arm64 · bookworm
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · amd64 · bookworm-backports
Fixed · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · arm64 · bookworm-backports
Fixed · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · amd64 · bookworm-security
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · arm64 · bookworm-security
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
[CVE-2026-47088 ] Published: Jul 16, 2026, 12:00:00 AM UTC
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 82
Low(3.1) Affected Details (6) 3.6.1-4+deb12u4 · amd64 · bookworm
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u4 · arm64 · bookworm
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · amd64 · bookworm-backports
Fixed · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · arm64 · bookworm-backports
Fixed · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · amd64 · bookworm-security
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · arm64 · bookworm-security
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
[CVE-2026-47089 ] Published: Jul 16, 2026, 12:00:00 AM UTC
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 cou
Medium(4.3) Affected Details (6) 3.6.1-4+deb12u4 · amd64 · bookworm
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u4 · arm64 · bookworm
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · amd64 · bookworm-backports
Fixed · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.10.1-3~bpo12+1 · arm64 · bookworm-backports
Fixed · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · amd64 · bookworm-security
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12
3.6.1-4+deb12u2 · arm64 · bookworm-security
Affected · Fixed: 3.6.1-4+deb12u5
nvd · cyrus-imapd · debian · bookworm; nvd · cyrus-imapd · debian · 12