{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-24031", "assignerOrgId": "8ce71d90-2354-404b-a86e-bec2cc4e6981", "state": "PUBLISHED", "assignerShortName": "OX", "dateReserved": "2026-01-20T14:56:25.872Z", "datePublished": "2026-03-27T08:10:18.100Z", "dateUpdated": "2026-07-15T01:17:37.386Z" }, "containers": { "cna": { "affected": [ { "defaultStatus": "unaffected", "modules": [ "core" ], "product": "OX Dovecot Pro", "vendor": "Open-Xchange GmbH", "versions": [ { "lessThanOrEqual": "3.1.0", "status": "affected", "version": "0", "versionType": "semver" }, { "lessThanOrEqual": "2.4.0", "status": "affected", "version": "0", "versionType": "semver" } ] } ], "descriptions": [ { "lang": "en", "value": "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." } ], "metrics": [ { "cvssV3_1": { "attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L", "version": "3.1" }, "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ] } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-89", "description": "Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')", "lang": "en", "type": "cwe" } ] } ], "providerMetadata": { "orgId": "8ce71d90-2354-404b-a86e-bec2cc4e6981", "shortName": "OX", "dateUpdated": "2026-03-27T12:33:25.301Z" }, "references": [ { "tags": [ "vendor-advisory" ], "url": "https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0001.json" } ], "source": { "defect": "DOV-8781", "discovery": "EXTERNAL" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-03-27T19:40:25.458839Z", "id": "CVE-2026-24031", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-27T19:40:35.437Z" } }, { "affected": [ { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/o:redhat:enterprise_linux:10" ], "defaultStatus": "unaffected", "packageName": "dovecot", "product": "Red Hat Enterprise Linux 10", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/o:redhat:enterprise_linux:6" ], "defaultStatus": "affected", "packageName": "dovecot", "product": "Red Hat Enterprise Linux 6", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/o:redhat:enterprise_linux:7" ], "defaultStatus": "unaffected", "packageName": "dovecot", "product": "Red Hat Enterprise Linux 7", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/o:redhat:enterprise_linux:8" ], "defaultStatus": "unaffected", "packageName": "dovecot", "product": "Red Hat Enterprise Linux 8", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/o:redhat:enterprise_linux:9" ], "defaultStatus": "unaffected", "packageName": "dovecot", "product": "Red Hat Enterprise Linux 9", "vendor": "Red Hat" } ], "datePublic": "2026-03-27T08:10:18.100Z", "descriptions": [ { "lang": "en", "value": "A flaw was found in Dovecot. When the `auth_username_chars` configuration is cleared by an administrator, it creates an authentication bypass vulnerability. This allows a remote attacker to gain unauthorized access to user accounts and enumerate valid usernames." } ], "metrics": [ { "other": { "content": { "namespace": "https://access.redhat.com/security/updates/classification/", "value": "Important" }, "type": "Red Hat severity rating" } }, { "cvssV3_1": { "attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L", "version": "3.1" }, "format": "CVSS" } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-89", "description": "Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')", "lang": "en", "type": "CWE" } ] } ], "references": [ { "tags": [ "vdb-entry", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/security/cve/CVE-2026-24031" }, { "name": "RHBZ#2452181", "tags": [ "issue-tracking", "x_refsource_REDHAT" ], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2452181" }, { "tags": [ "x_sadp-csaf-vex" ], "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24031.json" } ], "timeline": [ { "lang": "en", "time": "2026-03-27T09:02:06.766Z", "value": "Reported to Red Hat." }, { "lang": "en", "time": "2026-03-27T08:10:18.100Z", "value": "Made public." } ], "title": "dovecot: Dovecot: Authentication bypass and user enumeration due to cleared auth_username_chars configuration", "x_adpType": "supplier", "x_generator": { "engine": "sadp-cli 1.0.0" }, "providerMetadata": { "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "shortName": "redhat-SADP", "dateUpdated": "2026-07-15T01:17:37.386Z" } } ] } }