# Cyrus vulnerabilities

Source: https://junglewise.ai/threats/vendors/cyrus  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/vendors/cyrus.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 7 vulnerabilities in Cyrus: 0 in the last 7 days and 7 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-107161, was published on 7 October 2026. Nothing in the last four weeks, down from 1 vulnerability in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 7
- All time: 7 (0 critical, 0 exploited in the wild)

## About Cyrus

IMAP and SASL server implementation for email systems.

## Latest Cyrus vulnerabilities

- [CVE-2026-107161: Cyrus SASL heap buffer overflow in DIGEST-MD5](https://junglewise.ai/threats/cve-2026-107161-a-heap-based-buffer-overflow-flaw-was-found-in-cyrus-sasl-the) (high, CVSS 7.5, published 7 Oct 2026)
- [CVE-2026-61915: Cyrus IMAP double-free in CalDAV VPATCH handler](https://junglewise.ai/threats/cve-2026-61915-cyrus-imap-double-free-in-caldav-vpatch-handler) (medium, CVSS 4.2, published 9 Sep 2026)
- [CVE-2026-61911: Cyrus IMAP Sieve mailbox existence oracle](https://junglewise.ai/threats/cve-2026-61911-cyrus-imap-sieve-mailbox-existence-oracle) (medium, CVSS 4.3, published 9 Sep 2026)
- [CVE-2026-61910: Cyrus IMAP privilege escalation in Mailbox/set](https://junglewise.ai/threats/cve-2026-61910-cyrus-imap-privilege-escalation-in-mailbox-set) (low, CVSS 3.5, published 9 Sep 2026)
- [CVE-2026-61909: Cyrus IMAP CalDAV/CardDAV multiget ACL bypass](https://junglewise.ai/threats/cve-2026-61909-cyrus-imap-caldav-carddav-multiget-acl-bypass) (low, CVSS 3.5, published 9 Sep 2026)
- [CVE-2026-61908: Cyrus IMAP JMAP email-header blob ID out-of-bounds index](https://junglewise.ai/threats/cve-2026-61908-cyrus-imap-jmap-email-header-blob-id-out-of-bounds-index) (low, CVSS 3.1, published 9 Sep 2026)
- [CVE-2026-61907: Cyrus IMAP JMAP snooze ACL bypass](https://junglewise.ai/threats/cve-2026-61907-cyrus-imap-jmap-snooze-acl-bypass) (medium, CVSS 4.3, published 9 Sep 2026)

## Most severe Cyrus vulnerabilities

- [CVE-2026-107161: Cyrus SASL heap buffer overflow in DIGEST-MD5](https://junglewise.ai/threats/cve-2026-107161-a-heap-based-buffer-overflow-flaw-was-found-in-cyrus-sasl-the) (high, CVSS 7.5, published 7 Oct 2026)
- [CVE-2026-61911: Cyrus IMAP Sieve mailbox existence oracle](https://junglewise.ai/threats/cve-2026-61911-cyrus-imap-sieve-mailbox-existence-oracle) (medium, CVSS 4.3, published 9 Sep 2026)
- [CVE-2026-61907: Cyrus IMAP JMAP snooze ACL bypass](https://junglewise.ai/threats/cve-2026-61907-cyrus-imap-jmap-snooze-acl-bypass) (medium, CVSS 4.3, published 9 Sep 2026)
- [CVE-2026-61915: Cyrus IMAP double-free in CalDAV VPATCH handler](https://junglewise.ai/threats/cve-2026-61915-cyrus-imap-double-free-in-caldav-vpatch-handler) (medium, CVSS 4.2, published 9 Sep 2026)
- [CVE-2026-61909: Cyrus IMAP CalDAV/CardDAV multiget ACL bypass](https://junglewise.ai/threats/cve-2026-61909-cyrus-imap-caldav-carddav-multiget-acl-bypass) (low, CVSS 3.5, published 9 Sep 2026)
- [CVE-2026-61910: Cyrus IMAP privilege escalation in Mailbox/set](https://junglewise.ai/threats/cve-2026-61910-cyrus-imap-privilege-escalation-in-mailbox-set) (low, CVSS 3.5, published 9 Sep 2026)
- [CVE-2026-61908: Cyrus IMAP JMAP email-header blob ID out-of-bounds index](https://junglewise.ai/threats/cve-2026-61908-cyrus-imap-jmap-email-header-blob-id-out-of-bounds-index) (low, CVSS 3.1, published 9 Sep 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 1 vulnerability in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 6 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 1 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Cyrus vulnerabilities", https://junglewise.ai/threats/vendors/cyrus, 9 November 2026.