CVE-2026-27858
high
CVSS v3
7.5
CVSS v4 NEW
—
VIR risk
7.5
Description
Important: dovecot security update
Predictions
Exploit likelihood
83%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| rhel | 9 | fixed | |
| debian | bookworm | fixed | 1:2.3.19.1+dfsg1-2.1+deb12u2 |
| debian | bullseye | fixed | 1:2.3.13+dfsg1-2+deb11u3 |
| debian | forky | fixed | 1:2.4.3+dfsg1-1 |
| debian | sid | fixed | 1:2.4.3+dfsg1-1 |
| debian | trixie | fixed | 1:2.4.1+dfsg1-6+deb13u4 |
| sles | affected | | |
| rocky | 9 | fixed | |
| almalinux | 9 | fixed | dovecot-pigeonhole-2.3.16-15.el9_7.1.aarch64.rpm |
References
- https://access.redhat.com/errata/RHSA-2026:13857
- https://access.redhat.com/errata/RHSA-2026:19364
- https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0001.json
- https://security-tracker.debian.org/tracker/CVE-2026-27858
- https://www.suse.com/security/cve/CVE-2026-27858.html
- https://access.redhat.com/errata/RHSA-2026:13830
- https://bugzilla.redhat.com/2452172
- https://bugzilla.redhat.com/2452175
- https://bugzilla.redhat.com/2452179
- https://errata.almalinux.org/8/ALSA-2026-13830.html
- https://errata.almalinux.org/9/ALSA-2026-13857.html
- https://errata.almalinux.org/9/ALSA-2026-19364.html
- https://errata.rockylinux.org/RLSA-2026:13857
CWEs
CWE-400
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.