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Fencer Intel
medium 4.3

CVE-2026-61907 json

An issue was discovered in Cyrus IMAP before 3.12.4.

published 2mo ago modified last mo. also EUVD-2026-75139

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 11%
public exploits
0
none known

Summary

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 inbox, or any other of their mailboxes whose id was known to the user, despite having no insert permissions to the target mailbox.

Patch / fix

  • cyrusimap Cyrus IMAP 3.8.8, 3.10.4, 3.12.4
  • cyrus-imapd Debian 14 3.12.4-1

debian advisories DEBIAN-CVE-2026-61907

  • cyrus-imapd openSUSE Leap 16.0 3.8.8-bp160.1.1

opensuse advisories openSUSE-SU-2026:21929-1

Is CVE-2026-61907 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-61907 updated cvss 4.3

cyrus-imapd: cyrus-imapd: JMAP snooze bypasses destination-mailbox ACL

  • Red Hat Enterprise Linux 6 cyrus-imapd, cyrus-imapd-utils, cyrus-imapd 3.8.3-10.el10
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 cyrus-imapd-utils, cyrus-imapd 3.8.3-10.el10 Red Hat Enterprise Linux 8 cyrus-imapd, cyrus-imapd-vzic, cyrus-imapd-utils, cyrus-imapd 3.8.3-10.el10 Red Hat Enterprise Linux 9 perl-Cyrus, cyrus-imapd, cyrus-imapd-libs, cyrus-imapd-utils, cyrus-imapd 3.8.3-10.el10 Red Hat Enterprise Linux 10 cyrus-imapd 3.8.3-10.el10
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
last mo.

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Affected products

  • cyrusimap Cyrus IMAP

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.