Technology · Open-Xchange
Open-Xchange Dovecot vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 5 vulnerabilities in Open-Xchange Dovecot: 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-27860, was published on 27 March 2026.
- Last 7 days
- 0
- Last 90 days
- 0
- Critical, all time
- 0
- Exploited in the wild
- 0
About Open-Xchange Dovecot
Open-source mail server software providing IMAP and POP3 access protocols.
Latest Open-Xchange Dovecot vulnerabilities
- CVE-2026-27860: If auth_username_chars is empty, it is possible to inject arbitrary LDAP filter to Dovecot's LDAP authentication. This…lowCVSS 3.7EPSS 0.3%
- CVE-2026-27859: A mail message containing excessive amount of RFC 2231 MIME parameters causes LMTP to use too much CPU. A suitably…mediumCVSS 5.3EPSS 0.4%
- CVE-2026-27855: Dovecot OTP authentication is vulnerable to replay attack under specific conditions. If auth cache is enabled, and…mediumCVSS 6.8EPSS 0.3%
- CVE-2026-0394: When dovecot has been configured to use per-domain passwd files, and they are placed one path component above /etc, or…mediumCVSS 5.3EPSS 0.4%
- CVE-2025-59028: When sending invalid base64 SASL data, login process is disconnected from the auth server, causing all active…mediumCVSS 5.3EPSS 0.4%
Most severe Open-Xchange Dovecot vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-27855: Dovecot OTP authentication is vulnerable to replay attack under specific conditions. If auth cache is enabled, and…mediumCVSS 6.8EPSS 0.3%
- CVE-2025-59028: When sending invalid base64 SASL data, login process is disconnected from the auth server, causing all active…mediumCVSS 5.3EPSS 0.4%
- CVE-2026-0394: When dovecot has been configured to use per-domain passwd files, and they are placed one path component above /etc, or…mediumCVSS 5.3EPSS 0.4%
- CVE-2026-27859: A mail message containing excessive amount of RFC 2231 MIME parameters causes LMTP to use too much CPU. A suitably…mediumCVSS 5.3EPSS 0.4%
- CVE-2026-27860: If auth_username_chars is empty, it is possible to inject arbitrary LDAP filter to Dovecot's LDAP authentication. This…lowCVSS 3.7EPSS 0.3%
Vulnerabilities per week
Nothing was published in the last eight weeks. The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 0 | 0 | |
| 19 Oct 2026 | 0 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 0 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many Open-Xchange Dovecot vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/open-xchange-dovecot)<a href="https://junglewise.ai/threats/technologies/open-xchange-dovecot"><img src="https://junglewise.ai/threats/technologies/open-xchange-dovecot/badge.svg" alt="Open-Xchange Dovecot vulnerabilities" /></a>How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/open-xchange-dovecot.json, and this page as text at https://junglewise.ai/threats/technologies/open-xchange-dovecot.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Open-Xchange Dovecot vulnerabilities", https://junglewise.ai/threats/technologies/open-xchange-dovecot, 9 November 2026.