CVE WatchSep 16, 2026

CVE-2026-61909

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 sh

CVSS

3.5

Low

EPSS

0.2%

p10

KEV

—

Exploit Today

0-100

Published: Sep 9, 2026 · Last modified: Sep 16, 2026 · CWE-420

EPSS · 30d

0.2%EPSS · 30 days0.4%

2026-09-232026-10-21

Technical description

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.

Official references

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