CVE-2026-24031: Open-Xchange OX Dovecot Pro · SQL Injection
Affects Open-Xchange OX Dovecot ProSource CVE Database V5
Not known to be exploited · CVSS 7.7 High.
Data as of 30 Oct 2026, 06:59 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 34% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:LExploitation evidence
Disclosed: evidence found.
CVE published 27 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
Public exploit code: GitHub proofs of concept
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), GitHub proofs of concept, the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Open-Xchange GmbHOX Dovecot Pro | Affected
| Fixed in– |
AI-suggested
Administrators should avoid clearing the auth_username_chars setting to prevent exploitation. If clearing this setting is necessary, upgrading to the latest fixed version of OX Dovecot Pro is recommended. Patch status is not explicitly confirmed in the vendor advisory content provided; therefore, check the vendor advisory for current remediation guidance.
Description
Dovecot SQL based authentication can be bypassed when auth_username_chars is cleared by admin. This vulnerability allows bypassing authentication for any user and user enumeration. Do not clear auth_username_chars. If this is not possible, install latest fixed version. No publicly available exploits are known.
References
- documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0001.json (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-24031 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2452181 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24031.json (opens in a new tab)