CVE-2026-24031 | Open-Xchange OX Dovecot Pro up to 2.4.0/3.1.0 auth_username_chars sql injection (adv-2026-0001)

VDB-353852 · CVE-2026-24031 · ADV-2026-0001 OPEN-XCHANGE OX DOVECOT PRO UP TO 2.4.0/3.1.0 AUTH_USERNAME_CHARS SQL INJECTION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.6 $0-$5k 2.34+ Summaryinfo A vulnerability, which was classified as critical, was found in Open-Xchange OX Dovecot Pro up to 2.4.0/3.1.0. This issue affects some unknown processing. Such manipulation of the argument auth_username_chars leads to sql injection. This vulnerability is uniquely identified as CVE-2026-24031. The attack can be launched remotely. No exploit exists. You should upgrade the affected component. Detailsinfo A vulnerability was found in Open-Xchange OX Dovecot Pro up to 2.4.0/3.1.0. It has been rated as critical. Affected by this issue is some unknown functionality. The manipulation of the argument auth_username_chars with an unknown input leads to a sql injection vulnerability. Using CWE to declare the problem leads to CWE-89. The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. CVE summarizes: 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. The advisory is shared for download at documentation.open-xchange.com. This vulnerability is handled as CVE-2026-24031 since 01/20/2026. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1505. Upgrading eliminates this vulnerability. Productinfo Type Mail Server Software Vendor Open-Xchange Name OX Dovecot Pro Version 2.0 2.1 2.2 2.3 2.4.0 3.0 3.1.0 License open-source Website Vendor: https://www.open-xchange.com/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.6 VulDB Meta Temp Score: 6.6 VulDB Base Score: 5.6 VulDB Temp Score: 5.4 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 7.7 CNA Vector: 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Sql injection CWE: CWE-89 / CWE-74 / CWE-707 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Timelineinfo 01/20/2026 CVE reserved 03/27/2026 +66 days Advisory disclosed 03/27/2026 +0 days VulDB entry created 03/27/2026 +0 days VulDB entry last update Sourcesinfo Vendor: open-xchange.com Advisory: adv-2026-0001 Status: Confirmed CVE: CVE-2026-24031 (🔒) GCVE (CVE): GCVE-0-2026-24031 GCVE (VulDB): GCVE-100-353852 Entryinfo Created: 03/27/2026 09:53 Changes: 03/27/2026 09:53 (64) Complete: 🔍 Cache ID: 99:909:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸