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VulnerabilityPublished Updated

CVE-2026-24031: Open-Xchange OX Dovecot Pro · SQL Injection

Affects Open-Xchange OX Dovecot ProSource CVE Database V5

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Not known to be exploited · CVSS 7.7 High.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 3.1 base score
7.7High
How severe the flaw is on the 0–10 CVSS scale.
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:L

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 Mar 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    Public exploit code: GitHub proofs of concept

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
Open-Xchange GmbHOX Dovecot ProAffected
  • <=3.1.0
  • <=2.4.0
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

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