CVE-2026-619093.5LowCWE-420

CVE-2026-61909: cyrusimap Cyrus IMAP vulnerability

cyrusimap · Cyrus IMAP

Fixed in 3.12.4 · Affected: cyrusimap Cyrus IMAP before 3.12.4 · Exploitation: unlikely (under 1%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

0.2%probability of exploitation in the next 30 days

10th percentile

050100

Higher than 10% of scored CVEs

3.5LowCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

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 contacts by including the target hrefs in a calendar-multiget or addressbook-multiget REPORT.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

cyrusimap · Cyrus IMAPbefore 3.8.8; from 3.9.0 before 3.10.4; from 3.11.0 before 3.12.4

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Unlikely (under 1%). EPSS under 1%, or no score yet.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Unprotected Alternate Channel · Access Control
Vendor: cyrusimap
Published: September 2026
Band: Unlikely (under 1%), September 2026

CoverageNo articles yet

No CyberSIXT article names CVE-2026-61909 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.