CVE-2026-61909

mediumpriority · track · 17EPSS 0.002 · 10 %ileDEUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.20% (10th) EPSS

CVSS 4.3 · medium

Is it mine?

7 products

Check your exposure

Who says so?

2 sources

cert_bund · nvd

EPSS · scored 2026-10-28

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.

cvss

Technical severity, 0–10. One row per scoring source.

4.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.5–4.3

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 1.4

v3.13.5lowCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:Nsecondary · cve@mitre.org USexploitability 1.8 · impact 1.4

v3.14mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-420US

affected products (7)

Products and version ranges known to be affected.

SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
Open Source cyrus imap< 3.10.4cert_bundDE
Open Source cyrus imap< 3.12.4cert_bundDE
Open Source cyrus imap< 3.8.8cert_bundDE
cyrus imap< 3.8.8nvdUScpe:2.3:a:cyrus:imap:*:*:*:*:*:*:*:*
cyrus imap3.11.0 → 3.12.4nvdUScpe:2.3:a:cyrus:imap:*:*:*:*:*:*:*:*
cyrus imap3.9.0 → 3.10.4nvdUScpe:2.3:a:cyrus:imap:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-3301cyrus imap: Mehrere SchwachstellenDeutsch2026-09-09csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in cyrus imap ausnutzen, um Sicherheitsvorkehrungen zu umgehen, Daten zu manipulieren oder offenzulegen oder einen Denial-of-Service-Zustand herbeizuführen.

sources

Which sources assert this record, and when.

cert_bund nvd NVD CVE.org MITRE

published 2026-09-09modified 2026-09-16

references (4) nvd

External citations — patches, advisories, analysis.

https://cyrusimap.orgProduct
https://www.cyrusimap.org/3.12/imap/download/release-notes/3.10/x/3.10.4.htmlRelease Notes
https://www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.4.htmlRelease Notes
https://www.cyrusimap.org/3.12/imap/download/release-notes/3.8/x/3.8.8.htmlRelease Notes

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan